Only this removed grout stains

Well we tried a lot of products. Only Brillo works part way at removing the stains from mortar and grout off our black sink. Kat found a video where someone recommended Mr. Clean Magic Eraser. Wowzer! Watch and see.
• Birds in Flight: Dan Libowitz

[@homebuiltacoustics8510]

This project turned out beautifully! Great job!

[@Mity_Moose]

Thank you! Cheers!