if u are stripping to bare metal or just to base coat i would use 180 then to 220 then prime it i use epoxy primer but if u have any bare metal i would use self etching primer.then once u get it prime i would give 2 or 3 coats primer waiting about 15 20 mins.wet sand it with 500 then 600 if u burn threw u got to reprime it. then again wet sand it,when that's done i use a solvent 1 wet rag 1 dry rag as soon as u wet it wipe it off,then tack rag it now your ready for base coat,i do 2 to 3 light coats of base as soon as u see it dull dust it again waiting bout 5 to 10 mins after u got 3 coats and its dry it can be wet sanded again try not to burn threw it is easy to do that on the body lines.if u burn thew u got to spray it ,once that's done ur ready for clear coat this u want to spray 1 to 2 heavy coats but not to heavy it'll run on ya.when then done wet sand it with around 1000 to 1500 wet sand paper.sand it (to get out blemishes) then buff if with a buffer variable speed works best.slow speed with buffing compound and water. now u can sit back and say WOW thats looks good. hope this helps ,mike