I made the mistake this morning of clearing the mist/water on the outside of my rear screen with a credit card, and when I went out at lunchtime I noticed some credit card sized terrible scratches. I dont really understand how...but anyway. My question is what is the best way to remove scratches from a plastic screen. Can I use T -cut or autoglym car polish? (11/99)
If the scratches aren't too deep, go to your nearest BMW dealer and ask for part number 81 22 9 407 665. That should be an excellent product for plastic window care. I haven't tried it myself, having a mk2 with a glass window :^p, but the people on the barchetta mailing list seem to be very happy with it. (11/99)
Get hold of Meguirs plastic polish and cleaner. Worked a treat for me: Not sure who sells it in the UK though: Moss? Some also say liquid brasso works well as well. (11/99)
I think it was Meguirs that I picked up at Billing - not sure off the top of my head. If so, then you can buy it from JAG Bags (don't know the number, sorry).. If it's not Meguirs I have at home then JAG Bags do sell some pretty good polishes for the window.. They had about 3-4 different levels from light polish to heavier scratch removal polish - seems quite good stuff from the 1 time I've used it so far. (11/99)

Try Jayne Grogan for Meguiars at:
JAG BAGS
37 Highwood Avenue,
Solihull,
West Midlands
B92 8QY
Tel: 0121-743 8646

There are 2 grades, one for getting the scratch out, one for polishing and general cleaning - "restoring optical clarity" as our marketing friends would say ;-) Miata.Net FAQ suggests Meguiar's #17 Plastic Cleaner and #10 Plastic Polish. (11/99)

Spent most of the afternoon cleaning the car and decided to try my autoglym polish on the rear plastic screen. After cleaning with the autoglym glass cleaner I slapped on some polish. What a difference !! Did the inside as well and its as close to perfection as I think I have ever seen it since buying the car. (3/00)
Is there any way of having the rear PLASTIC window totally zip out to avoid the "scrunch" damage in the first place? (1/00)
For not much more than you've been quoted [to replace the plastic window] you could get a really good GLASS rear window put in which doesn't suffer all the issues with non visibility etc. The MATT DEVELOPMENTS window, £230 from Donutz You do have to fit yourself ( video included to show how ) but the quality of vision is great. (1/00)
Any decent trimmer familiar with fitting new plastic back windows to MX's could also fit it for you. (1/00)
I had mine replaced after splitting it by putting the roof down when it was cold (and forgetting to unzip the window! ) - Doh! :-( £100 for a new window, the whole roof had to be taken off, the old window was then cut out and a new one double stitched in. Looks pretty good, although the new window is stitched on the outside of the roof section to avoid leaks. (1/00)

I'd heard in the past that regular car polish can be used to clean the plastic rear screen fitted to the Mk1, so yesterday before washing the car I set about the rear window with the Autoglym (Super Resin Polish). Firstly I tried a small area just to make sure it didn't do any harm - seemed ok so proceeded to do whole window.

After a couple of applications (plus one to the inside as well) it looks a whole lot better. Not quite as good as new, but very nearly there. A bonus is that water runs off it a lot more easily now as well. If you want to see what a difference it makes try cleaning the drivers side whilst leaving the passenger side untouched. (I didn't think of this until after I'd finished, otherwise I would have taken a photo - doh!)

A quick tip - make sure you let the polish dry fully before buffing off - go and make a coffee or something for five minutes. (2/00)

I used Brasso on my old frog eyed sprite and the back window came up as new. (2/00)