I'm detailing my 2009 maxima and have around 10 hours experience behind a GG6. I don't know all the in's and outs about detailing paint on the front a rear bumpers what are made of fiberglass/plastic??? I was thinking about doing both bumpers by hand and wanted to see what the best way is to accomplish this task. I did the rest of the car with FG 400 and SF 4000 and it turned out great. I was also thinking about doing the larger areas on the bumpers with the DA and doing the rest by hand but I have read in a few places that it's much easier to mess the paint up on the bumps so I just wanted to see if I could get some help as to the best way by hand and what I need to be careful with when using the DA. Feed back please Thanks for your input into how to attack these areas and I will keep searching the forum at the same time on this topic