Your plastics

eh... a hand saw? does it have fine teeth?
you want to make sure you sand the edges when your done, it just cleans it up a bit.
I think i used like 120 or 160 grit sand paper, just dont start melting the edge of it
 
Yeah it has fine teeth, and i'm just gonna use 300 grit cause that's all i have haha. It'll work. I'll make it work... I'm a guy.