QUOTE: Originally posted by nicevillescott
Does it matter what color you use as your primer? And what exactly does priming do in terms of final appearance? I've always been under the impression that the more paint you use, the better chance you have of losing surface detail.
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True primer paint is usually has very fine pigment particles that don't close up a lot of surface detail. Some, perhaps, but unless you put a bunch of coats not very much.
The advantages of priming are generally twofold:
1) It allows subsequent coats of paint to adhere better. Primer usually sticks better to styrene than base paints, and the base paints generally stick to the primer better than they do to plastic.
2) You can see surface imperfections much easier after a thin coat of primer than you could before priming. Seams that look perfect before priming will stick out like a sore thumb afterwards.
In some cases, mainly with paints that are the least bit transparent or translucent, the color of the primer will affect the overall shade of the final paint. Painting yellow, for example, over a dark surface is next to impossible. Painting it over a white coat of primer is pretty easy.