Hey all, Since my other post about the McLaren drew up some questions about sanding, I figured I'd post this. This was done as practice, so it was done on a door that was damaged and would be thrown out... no biggie if I burnt through. (I didn't!) Anyway, I intentionally scratched the OEM paint with 180 grit sand paper, and through the process of sanding with 400, 600, 1200, 3000, and finally 5000 grit, it came out. along with a pretty impressive amount of clear coat lol. Then it was buffed back to perfection with 3M's three stage polishing system. Enjoy! What a nice door... OPPS! 180 grit sand paper marks! Better sand it with 400 grit...The white power is the clear coat that was sanded off... 600 grit... 1200 3000... shine starting to come back 5000 grit. very smooth now. Final Result after a three stage polish with 3M compounds and polish.