If you're talking about cutting brass PE off the carrier sprues, I just use old #11 exacto blades on a ceramic tile surface. I have a PE cutter but find a dull 2nd exacto knife to be just as quick if not more handy.
Then I clip the PE piece into my smooth jaw hemostats and file along the length of the PE part to remove the nub. I use cheapo rat tail files I got a long time ago (although I know better ones exist). The hemostats are great for bending the PE as well.