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How to polish/buff polycarbonate (lexan) on roughly cut edge?

I'm not talking about minor scratches. I would like to polish 1/2" thick cube that I cut out with table saw, it's not transparent at all on the edges (due to rough cut), but I'd like it to be :)  Can I do it with some kind of Dremel attachment?

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pfred24 years ago
I've seen clear plastic flame polished but that might not work with the kind you have. This page describes several ways of polishing Plexiglass:

http://www.eplastics.com/Plastic/Plexiglass_Edge_Polishing_Charges

Sounds to me like Hand Polishing is the nicest process.
bratan (author)  pfred24 years ago
Wow Impressive!!! Thanks for the info!
IlirT5 months ago

you cannot flame polish polycarbonate. polycarbonate = lexan

you will have to sand lexan, rout it, or polish it with a buffing wheel

once polished you cannot glue a polished edge or it will craze.

this is true of most plastics except plexiglass

The only plastic you CAN flame Acrylic = plexiglass

as seen here flame polishing lexan is a mess (see what happens at 1:45)

CaseyT101 year ago

this is the little butane torch I used. From Harbor Frieght tools. And the fishing lure I touched up the edge of the lip.

I also included a picture of my test lexan. One side was heated just right...while the other was just a little too much heat.

20151007_102936.jpg20151007_102854.jpg20151007_103341.jpg
CaseyT101 year ago

I know this is an old topic, but I just wanted to add this incase anyone still looks for this information.

I have 1/8th inch lexan. Making fish lure diver lips. I tried sanding and polishing. That didn't work. So after reading this forum, I tried something.

Sand the edge flat with 240 grit sand paper.

Wet sand with 600 grit sand paper.

Use a small butane torch and quickly touch up the edges. Only allowing a tiny amount of heat to graze the lexan. After a few passes, you will start to notice your edge turning clear. Let the lexan cool for about 10-20 seconds, and give it a few more passes.

Afterwards, I used a dremel polish pad and some Meguiars plastX clear plastic polish.

All done!

My project took about 2 minutes all together