Mist Coat: The Cure for Mottling or Streaks in Metallic Paint
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- Опубликовано: 30 сен 2024
- A very simple cure for mottling or streaks in metallic paint is a mist coat or a drop coat and this short video explains very easily how to apply it.
/ @lakesideautobody
Great video I want to thank you for for your channel I've been doing body work for 25 years in North Western PA owning my own shop and you have taken me back to basics and improved my skills my son's have also came to the conclusion your a much better teacher than me lol again keep up the good work
Thank you very much and you are welcome for the vids. Keep up the good work with your sons - my dad was my teacher and I can never thank him enough. I've always been very proud to know the trade. My old boss said, "A mechanic can fix engines but a body man can fix anything" :)
My auto body instructor always taught us that if you have the paint mixed right and the gun set up right you could spray a hood silver metallic ...and then spray a "x" across the hood and you would never see it. And he demonstrated this...successfully.
I never had that much luck. I'd love to see it though.
What kind of paint? Laquer?
@@jostrander71 No...acrylic "animal" ( acrylic enamel). However, the principle remains the same...paint mixed right, gun set up right, technique right = no mottling or striping. The problems that I see today include spraying with a crappy compressor that won't put out enough cfm @ 60 psi. ( should be at least 14 cfm @ 60 psi....5 hp. compressor minimum). Add to the crappy compressor a crappy cheap spray gun with too small a spray pattern and the wrong needle size. And on top of that a bad booth with poor lighting and bad technique. It will all add up to failure. If I had to go back and spray cars again, this time I would go with a 2qt pressure pot /HVLP spray gun. That way I would have no refilling the gun part way through a coat. Also, because the gun is small in size, being separated from the paint pot, there is much less fatigue in maintaining a true perpendicular orientation to large surfaces like a roof or a hood.
needed some tips on the drop coat, first video on the list was Lakeside and I made the right choice as always you explain everything so well thanks
You're welcome my friend :)
Great! I use a similar technique spraying latex and waterborne in airless and HVLP turbines on house stuff- good to know this concept applies similarly to automotive
I have a metallic silver color I like in an enamel single stage. I don’t clear that do I? I’m a rookie in painting obviously. Thanks.
You don't have to clear single stage. You can if you want though - like say if you are blending or doing a spot repair. Feel free to ask any ?s you have my friend :)
Yes thanks
👍😊
Great video. I found on waterborne ,the drop or effect coat works best when the basecoat is still wet 👍
Yup!
Immediately following your final coat, pull your gun back and lay your orientation coat. Most people also suggest to drop your pressure.
Will need to try that, I’ve always seen it done after flashing the second coat for 15 minutes
Thank you so much for clearing it up about putting a higher/lower pressure for the drop coat. Great video
Glad it was helpful - have a great week end :)
Oh, good tip my friend! Looks great! Back in the old days with acrylic enamel, you had to hold the gun back about 18 inches. That gun was a Binks #7. I still have that gun!
You're the man - you're exactly right. Used that gun my whole life. My dad had a real one - I always had copies. He'd always get pissed cause I was irresponsible and left paint in the gun. Those guns ruled - dumped a ton of paint and smooth as silk.
Lakeside Autobody, yep, mine is an original I bought new in the 70's. I even bought a cup that had a magnetic paddle in the bottom that was air powered. I used it for the big heavy Metalflake I used back then. I did a few killer Metalflake motorcycle tanks and the matching helmets. I think I had much more patients masking little stripes and designs back then than I do now! I am 65 years old and am working every day restoring a 29 Model A coupe. I don't guess I will quit till they carry me out in a box! Ha! Take care Sir. I enjoy your videos! Tom
@@Okie-Tom I love those huge flakes - like on the old speed boats. Would love to see your Model A when you're done. You take care too.
My spray paint says 10 to 15 minute flash time, is the dusting within a few minutes before the last coat dries?
Yes - It's a judgement call. If the mist coat just sinks right in and the mottling stays the same or gets worse, it needs to be dryer. You want it dry enough for the flakes stay put but wet enough to flow out if you are spraying single stage. Base coat can be sprayed on the dry side - all coats. The clear will be sprayed wet though :)
Just helped me painting my mirror with cans. I kept trying to figure out why I was getting the streaks.
👍
Thanks for the video, makes me feel better knowing I was doing it right, when i had tiger stripped silver metallic, worked great.later, bill in w mi
You're welcome - It isn't the gun like you may have heard on the internet.
Interested what your air pressure was, and what you raised it to in the drop coat? Enjoy your channel, thank you
I don't know - I know that sounds really bad but I've always gone by feel. Basically you want it to throw as much paint as the gun can with the least amount of over spray. If you can get the same amount of paint turning the pressure down then do it etc. etc. One your last coat just turn it up a bit - enough so you can move the gun back a little and dust coat it. Ask more ?s if I didn't help you. Jerry
underrated channel
Thanks TRP90 - enjoy the week :)
Do u tack rag the mist coat before clearing
I don't but have heard of a few guys that do. I'm always afraid to mess something up - maybe make wiping marks, mar the metallic flakes, smudge the paint, etc. I've never had any issues not tacking it but there might be benefits too so... I guess it's a choice thing :)
Good work, thank you
You're welcome :)
Hi Lakeside,
Watch your videos all the time. I'm a novice regarding car painting. I tried painting my in the fall and noticed a lot of mottling. Can mottling be wet sanded out or it needs to be repainted?
Thanks!
It has to be repainted - thanks for watching and you're welcome :)
The purpose is to get the flakes to lay and stay. If the paint is wet its like a pool and the flakes swim
@@path4514 Good analogy :)
@@LakesideAutobody thanks brother.great videos
What grit should be used to respray base coat? Does it need to be removed completely and reprimed? Or, does it just need to be scuffed and resprayed with another layer of bascoat?
I've done it with rattle cans (metallics, specially silver) and it works just as good! I've discovered it by experimenting.
👍🛠😊
Thanks for the tip I'm a beginner I like the metallic but for the first time spraying I'm a little nervous.
BC/CC just spray the base somewhat dry - no worries about orange peel - it's only color and a carrier. Clear is the one you want to make sure the last coat is nice and wet.
Wow, this video saved my metallic paint job today. After second coat of base, i could see some bad streaking. Panicking, i searched what to do. First guy said up the pressure, you guys said lower it. I went with your advice , hurried back to the garage, and it worked great! Thank you so much!
I like upping the pressure. Think of crop dusting or distributing seed evenly - you want to sort of blast it out there. So.... up the pressure, move back a bit and crop dust. For me, it has always worked. You have to do it at the right time though - just when the paint has dried a bit and can take the dry spray yet be wet enough to lay down.
Won’t it go on dry and rough if you turn the pressure up as to turning it down? That’s the result I’ve been having anyways. Thanks!
Don't worry about getting the base coat wet. Let that base coat dry for about an hour - then spray two coats of clear - the first is a medium/wet coat - the second with be wet to the point of running and it will lay out nice and flat. With single stage - on the last coat if you have any mottling go around twice - the second time is your mist coat. Let it tack up a bit if the mist coat isn't helping - then try again. Let me know if you have any more ?s - Jerry
Good advice I remember decades ago doing industrial metallic had streaking so experimented and up with your method worked a treat
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I'm learning the trade now. I'm being taught to drop my pressure to about 1 bar for a drop coat, spray it from further back and do random spray patterns.
Just imagine spreading grass seed - that's the idea. Some guys use higher pressure (me) some guys use lower pressure. You are basically crop dusting :)
thanks man, you saved my DIY car bumper spray can restore project! I had some bad tiger stripping and the mist coat got rid of it.
You're welcome my friend - glad to hear it worked for you :)
Great video very well explained thanks for sharing that i painted a bonnet and it came out tiger stripes and mottling as well can you sand it down or just do a mist coat base coat paint
Yes. Your base coat doesn't have to be wet.
Does the drop coat make the panel dry or does it stay smooth I have problyms with base being dry I spay with iwata lph 400 At 20 psi
It is applied right after the last coat. There is a small window of time in which it will melt in nicely yet the metallic flakes stand up and stay positioned so that you get no mottling. If you use a drop coat too early it will continue to mottle or look splotchy - if you use a drop coat too late it will result in dry spray or orange peel.
Did my job using your method it looks perfect for the first time ever thanks a bunch .
I'm happy to hear it my friend - thanks for watching :)
Did you sand before clearing? Thanks!
No - I don't even run a tack cloth over it for fear of messing around with the metallic flakes or messing it up somehow. If you want to remove some dust specs, you can always knock them down a bit after the clear dries and buff.
Great video thanks for sharing that very well explained 👍
Glad you enjoyed it - thanks for watching :)
Hello, maybe I missed a video but how did you blend the old paint to the new paint right behind the passenger rear door by the rear window. I see you masked it up how did you get rid of the line or melt old clear with the new clear
Excellent question. I cheated on this one. This is a no no but I ran a piece of tape right on the crown of the body line. After the paint dried I lightly knocked the edge down with a piece of 1200 grit wet sand paper and then hand rubbed it. The paint matched very well so I got away with it. Otherwise I would have had to paint that whole section over the windows all the way to the front. Dealership body shops would do this but it costs more money of course.
I'm amazed that your using a $60 gun in a professional setting. I've thrown better guns than that SATA copy you're using into the garbage can. Makes me wonder why I've spent $15,000 for top of the line professional guns. Current favorites are the Iwata Supernova LS400 for base and the WS400 for clear.
SATAMAN Schmidt how do you know it’s a fake. You can barely even see it.
@@Imwright720 Well, I own about 50 spray guns (I'm a collector) and that's a SATA 92 knock-off. Easy to tell as the fan adjustment is on the left side of the gun (standard SATA position) and the knock-offs have a black band behind the aircap as the gun in the video does. Some of these knock offs are very high quality. For example Harbor Freight's new Black Widow gun, which they sell for close to $200, is a very good SATA 5000 knock-off and sprays great. My problem with the Black Widow is that HF doesn't sell rebuild kits for them and that's crazy for a $200 gun. I rebuild my front line guns, the ones I use all the time, once every three years. I'm not throwing out an Iwata Supernova or a SATA 5500X because I can't find a rebuild kit for it. Spray guns have parts that ware out due to normal wear and tear. It's imperative to be able to get parts for them especially when a SATA digital 5500X sells for $900.
@@Imwright720
If you can't tell that's a cheapy Chinese gun, than you dont have much experience...
Painters know😉
Where did you get the knock off gun at about how much was it?
Hello my friend hope all is well my question is what couses mottling in the matalic paints can you explain the comman mistakes thanking you for your videos
First it's not the gun, the paint, mixture or anything else. Metallic flakes are just that flakes - sometimes they sink down, stand on end, lay flat, sink to the bottom, lay on top -etc. If you spread grass seed do you drop a hand full on the ground? No. You throw it up it the air to let it do it's thing and spread out even. That's the drop coat or mist coat. Happy Holidays
I do this all the time and I thought I was cheating!😅good to know others do it too
👍💯😊
Hi thanks for the video, I've noticed abit of mottling on a panel I've recently sprayed. I've only base coated and not put the clear over the top do I need to rub the panel down or can I spray over the top of the mottling? Thanks
There is a window in which you can re-coat. Sometime this is stated on the can. The rule of thumb is usually the same day, you can re-coat w/o doing anything to it. If it's the next day, I would scuff it with these pads - it doesn't take too long. If you think you have dust you might as well wet sand it with 400 or higher.
www.autobodytoolmart.com/product/3m-scotch-brite-pro-hand-pads/3m-automotive?gclid=CjwKCAjwh472BRAGEiwAvHVfGviFkM5bCrZW417-ci7ZgnfppP8XGdDOafyTqGrvCflivB6wkkjsDBoCbQsQAvD_BwE I always use the red but it's up to the individual - gray is finer. Hope that helps.
couldnt have said it better. on normal jobs this works like it should, unless you play with custom flakes, then have to keep flakes in suspension or use a pixie duster, but thats custom stuff, not normal day to day.
question, based on profile name re you in Virginia? there is a area called that, used to have an amusement park there
No - up in Michigan but love driving through Virginia - nice drive.
@billyfromtheusa Forgot about the tolls - wife called them toll trolls
I love being from Virginia far from is best!
This makes sense but I've heard that higher pressure can cause the paint to look flat or mat after spraying. Is there a secret to stop this?
You can do a drop coat or a mist coat with out changing the air pressure too if you prefer that. Some folks even do a drop coat using lower pressure - You have to find what works for your individual style of painting. Example: I use a sharper pattern and move fast where as another guy might use a wide open fan and move slow. Everyone paints a little different so.... it will be trial and error to find what works for you.
Thanks for this tip......been having trouble spraying single stage dark metallics I'll give this a try.
If you spray the whole car - on the last coat don't even leave the booth (or garage). When you have gotten around the car where you began see if the paint is wet but tacky then go ahead with the dust coat. if it's a bit dry try reducing the paint so it melts in a bit more. If it's hot out you're going to have to mist coat areas as you go around the car. i.e. spray the hood mist the hood - spray the fender mist the fender etc. Gotta try all kinds of strategies as every situation is different and you'll have to adjust on the fly.
@@LakesideAutobody Will do planning at doing an overall next spring to the car, as it is to cold in NJ . the booth I built is not heated.
Great tips! How would you apply this technique to a whole vehicle? Would you mist coat about half way through the car (break the car into sections)?
Right after you spray your last coat, go around again with a mist coat. That gives the first panel you hit (the starting point) plenty of time to tack up. This video demonstrates a mist coat on the last coat. This is single stage metallic so it's a good example: ruclips.net/video/aJHa1grz5Fs/видео.html
@@LakesideAutobody Thank you! I will report back with how it goes! 🤞
As always great video. How much did you turn the pressure up? I usually spray base around 25 PSI give take depending on the gun and conditions.
Probably around 3 to 5 psi. Think of it as spreading grass seed - you don't want to just drop them in a pile.
Hi Great video with the mist coat i lower the pressure then do a mist coat, i am going to be spraying Melachite green metallic
I've heard guys doing that too - sounds like a cool color :)
@@LakesideAutobody Its a Beautiful color its a dark green with metallic in it.
Great video as always. I have had trouble with tiger stripping. I will have to give tis a try. I'll get an old Nova fender and test away.. Nice guitar work on the intro👍👍👍
Thanks - glad you like the video and intro. Watch for the video tomorrow (2/26/21) - It's exactly on what you are talking about - tiger stripes - I sort of go over why tiger stripes happen and how to cure it. Hope you see it - I think it will really help. Jerry
@@LakesideAutobody I will I'm in the hospital with a knee replacement so I will have plenty of time and pain meds. So let's have a good loud guitar intro...lol
@@bobgreen3116 Absolutely - hope everything is going well with your knee replacement. Don't know what kind of music you're into but check these two videos out: ruclips.net/video/LFxOaDeJmXk/видео.html and ruclips.net/video/kIXCk9XxTSg/видео.html talk about great musicians especially both solos - it's unfair :)
Thank you. That's all I have to say.
You're welcome - have a good week end :)
Good info for beginners
Thanks - Happy New Year :)
Thanks for the tip
You're welcome :)
Nice segment
Thanks - have a good week :)
Thank You!!!
You're welcome.
I watched 10 videos for 20 minutes long and you explained it way better than else
Thank you - I appreciate that :)