Cheers for that, I was just a bit concerned that if I took the trim off the whole rear window would fall out - you know what they are like!!! I have got some proper plastic bumper and trim spray paint so I'll give it a go with that first if it works great, if it doesn't I've lost nowt cos the trim is badly marked anyway. If it works I'll post details of the product on here, if not I'll go down the route you suggest.