i painted mine myself too,pretty much how the other guys explained it, i used a random orbiter sander and went with 80 grit. for the front bumper, don't be afraid to put plenty of clear coat on. the shop was gonna charge me $600 for both bumpers, and the bumper cap and valance...i did it all for less than $100(still have to do the valance, but I may have the shop do that)