Tweezers that people use to pluck eyebrows and nose hairs just won't cut it in modeling. There are much better tweezers out there, such as sharp ones, flat, rounded, and the really handy self-closing ones to hold parts as they dry. You can find these at Micromark (
http://www.dxmarket.com/micromark/dir/35.html) or check the local surgical supply store. I get mine at car show swap meets where I can get brand new ones for half of what Micromark charges.