I don't have it handy right now, but there's a GR8 article in an older issue of Professional Boatbuilder
on the different grades of tempered glass. The how it's made part, what types are how strong, & appropriate for what application etc.
If one's really that interested, odds are all it'd take would be a phone
call to them to find out which issue it's in, and then order a copy. Or do said process online.
As to polishing things other than glass, you can buff, rub, small scratches out of Acrylic
, not so much with Polycarbonate. As the latter's so soft that unless there are some new wonder compounds out there, if you try & get the scratches out of Polycarb, you just wind
up adding more. While with Acrylic
, I know guys who've done the "toothpaste" fix on small scratches in it.