www.ultimatehandyman.co.uk

I'm looking for a rigid sheet of white and/or black plastic (1mm-3mm thickness) that has a high gloss finish. I'm thinking something like an acrylic sheet but so far I haven't found anything like this.

Sounds like you want Perspex.
Have a read of these.
http://www.gcip.co.uk/EP/perspex_sheet.htm


http://www.perspexdistribution.com/extr ... -sheet.asp

dave