It's the kind of light wheel that rotates in front of a bulb, to cast colored light over a 1960's era silver tree. A friend bought one on Ebay, but the red light window is faded. He showed it to me, asking what can be done. I tested some glass paint, but the surface of the very very thin plastic is textured, like a waffle. The glass paint would sink into the texture, I'm sure. I took a quick look online for clear red acrylic sheet, but got a bunch of incorrect hits.

Here's a different one:

http://www.ebay.com/itm/Vintage-Rotating-COLOR-WHEEL-4-Aluminum-Christmas-Tree-Party-Light-Flood-EX-/170742310152?pt=LH_DefaultDomain_0amp;hash=item27c108e508

I had no idea where to post this question. But thought that someone might know where I could get a thin sheet of red plastic. Any ideas? Thanks!