I need to cut some of the lace off the front of my piece right at the hairline. When I did it the first time it wasn't smooth, I used scissors and now there are a bunch of super short hairs or just knots. It seems the best way to do this is from the under side with an exacto knife but how do you guys do this? Pin it to a cutting board, or foam head, or do I need someone's help to hold it while I slowly and carefully slice off the lace?