Plexiglas Chip Shield

[MikeInOr]

Especially for drilling Plexiglass you need to grind a bit so it can't grab I.E. backwards or neutral cutting edge. Lexan not quite so grabby. Drill for good clearance with fastener.

I have drilled a lot of acrylic... I have found brad point wood drill bits work best for me. I don't think I have ever cracked acrylic with brad point bits even when drilling close to the edge unlike chisel point bits,

 

[RobertB]

Polycarbonate is used in eye glasses and will be much more scratch resistant than acrylic. I

Actually polycarbonate (Lexan ,etc) scratches much easier than acrylic (Plexiglas, etc.). Eyeglasses have a scratch resistant coating applied to them.

You can buy polycarbonate with a scratch resistant coating, but it is very expensive and can be hard to find other than at a specialty plastics dealer, and you often can only get it in 4' x 8' sheets.

 

[Bob Korves]

Safety glasses are made from polycarbonate. It is much tougher and less brittle than acrylic, but also much softer and more easily scratched.