I tried 1000 + wet and dry but the results wernt brill and T cut
Im not looking for a perfect finish its just where some of the side decals have peeled off the colour green is diff shades so thought id try and see if i could get a close a match as i could.
Some places the plastic colour seems to go to a wite ish powder if i scrape it.
UV ray damage i think.
Plastic polish that you mention Finbar might do the trick.

BB you can try Greygate on my plastics if you like ;D