I am familiar with polyethylene, that happens to be one that is easy to use but what I am looking for is more of a list of plastics with the property of being "route-able", and maybe a list of plastics that are "not route-able".
As an example:
One project I have is a part a canon scanner that has to be stiff, 1/8" thick, 4 inches wide by 12 3/4 long with inside cut outs for large film negatives. (oh yes it has to be black or paintable black) One plastic that comes to mind is "lexan" but I don't know it that is workable with a router or if I can get it in a black color.
Another is a table saw insert with replaceable zero clearance section.........
I have other several "plastic" things that I want to make so the question is meant to be general in nature.