All the trim on my E30 needs attention and it will get it in due course. I decided to have a go at refurbishing the wing mirrors for starters.
The grey oxidised weathered wing mirror will be familiar to all.
After a bit of research on tinternet opted to try a white spirit and boiled linseed oil mix 3:2 ratio.
Rubbed the mixture on with a microfibre pad and wipe off the excess. I have no idea if the effect will last but it looks very well at this stage. To help it along, I finished it with Maguiars Ultimate Protectant Dash & Trim restorer.
Rub on with a different cloth towel and wipe off excess with a different towel also.
Before and after pic.