i have a silver civic and i what paint it on white, i have sanpaper for do the job and all about it but do i need put ptimer on it or not? my car is silver

 

yea it would be best to lay a primer down after u sand all the clear off the car with some 220 or 320..primar i use is some kind of 2k prime..4 to 1 mix

 

terrible advice. never sand off an intact, solid surface. unless the existing clear has broken down and failed there is no reason to remove it.

titi_vtec: you don't need primer, you need sealer. some brands use the same product for both, just at different consistencies (thin for sealer, thick for surfacer). try to find a brand, like PPG, that uses a separate sealer product as it has a better 'bite' or 'etch' characteristic to it. you'll get a longer lasting paint job that way.

for anyone who still has it backwards...

primer has nothing to do with paint work, it's the last step in body work. primer gets applied relatively heavy over bare body work and is then block sanded (like body filler) to give you a perfectly smooth surface to apply the top coat to. sealer on the other hand, is the very first spraying step in paint work. sealer is mainly used to even out the panel's color underneath the basecoat so that you get a consistent color across the entire panel or car. sealers also sometimes have an etching property to them so that they bite into the coating below them on the panel. sealer also does as the name suggests, and 'seals' the surface so that you get no bleeding of colors into the base coat color.