I'd think it'd work fine. I "hot knife" plastic hardware all the time and none has failed.
A scroll saw w/ a diamond grit blade might do the trick. Or a needle file.....but that sounds like work.
Hunt'nFish
i have an engraving bit for a dremel that i might try first, if that doesnt work im thinking carbide burr on die grinder.
hooks are on the way so ill report back soon