For those of you that use lexan, plexiglass, or maybe even normal celluloid in scalemaking, I have a suggestion. It's called vapor polishing, and it can take a scratched up lexan surface and turn it literally clear. Not well polished, optically clear. The process uses a chemical vapor to melt the outer boundaries of the plastic in vapor. Think of how a candle looks when you melt a bit of it with a lighter.

Anyway, I used to send pieces for this treatment when I was doing some machine design. It is used heavily in medical parts treatments. You can look up local places that do it. And, while they likely wouldn't want to do one razor (cost prohibitive, you could bring down a big stack of scales at a time. You MAY even be able to add a bunch of razors with dull scales to see if it does the trip.

A couple places that offers it as a service are shown here. I just googled em. No connection to them.

http://www.arrowcryogenics.com/vaporpolishing.htm
http://www.alphamco.com/vp.htm

Anyway, it makes things look very sharp. good luck - John

Warning; I am not a chemical engineer. Use this method at your own risk.