Hey aabry - like he said, don't try this without some type of DA buffer. Make sure you sand between each coat of paint - that's the biggest addition I'd make. 1500 grit and 2000 grit should be good as far as sanding is concerned. I also sanded between coats of clear (3 coats of clear should be plenty). Funny thing about my situation - I spent a good 10 hours working on it a couple weekends ago. Two days after I finished, some 18 year old who was texting and driving rear ended me, so insurance ended up paying for a professional job anyway. They swapped out my GT diffuser for a GXP diffuser in the meantime, so I'm pleased.