Auto body repair & detailing: Body kit, learned technique, bodyman

Question
Hi there, just have a couple of questions. I bought a body kit for my 2005 Monte Carlo and have been told it needs some putty and sanding to be prepped before putting it on. How do I know I got the right amount of putty and if I have it sanded properly?

Answer
How do you know you have the right amount of filler, and know if it's sanded enough? The same way you get to Carnigie hall- practice, man, practice. I can't teach you this- it's a learned technique. Every bodyman has his own unique style- ane every bodyman started with a piece of sandpaper and a sanding block. Start coarse- 80 grit- and follow with 150, then 220, then 320, then primer.