Is multiple paint coats really necessary and tougher ?

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Is multiple paint coats really necessary and tougher ?

Post by Kokain on June 9th 2017, 12:21 pm

For a track car paint job and painting parts, wheels etc, is there a reason to build multiple coats like 8-12 if you don't plan on sanding and buffing at the end? Especially if things get scratched and you are after quick touch ups, will 3-4 coats be sufficient once the paint gets coverage?

I always assumed the multiple coats are if you sand between each layer, buffing the paint to a nice ultra gloss finish, never really thought if more means tougher or more resistant to UV, oil, dirt, stone chips etc. What do you guys think?
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Re: Is multiple paint coats really necessary and tougher ?

Post by Samilcar on June 11th 2017, 12:52 pm

The main reason for multiple coats is to have the ability to sand and buff. Having fewer, thicker coats will work, but the roller marks are more likely to show (the less thinned paint will not "flow-out" before it flashes, which preserves any roller marks in the end paint job). Using just 1-3 coats of paint that's thinned enough to flow out and not leave roller marks is likely to be TOO thin to have much hiding power for what it's painted over.

So, it would probably be better to spray if you're using just 1-3 coats of thicker paint.
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