Originally Posted by
Nordschleife
If the surface is that oxidized, wouldn't you be concerned that firing the surface would bake those impurities into the poly? The temp wouldn't reach the flash point to burn them off.
I would never even
try this on a large, flat surface. And, you are 100% correct. The surface must be clean and uniform for this to work. Do a You Tube search for for "Flame Polishing Acrylic". It will give you an idea of what you can do with it.
And MAPP is better than Propane. And Hydrogen is better yet. Never used Acetylene.