Making a Lima Class 31 look less plasticy with a budget of £zero

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A project, for a friend, thats been on my workbench for some time finally gets done!!
With a budget of £zero, I had to scratch build or scour the spares bin for parts.
The only parts I bought were the reinforcemed window surrounds for 427. They were purchased from
Shawplan, here..
www.shawplan.com
Other paint tools and materials were as ever purchased from Trains4U
www.trains4u.com
Reference photos from my own collection this time, one of which can be found here...
www.flickr.com...
Converting Lima Class 31's to ETH fitted Regional Railways era (1991-6) 31408 & 31427