I'm sure I read that primer (not sure if this applies to grey. red oxide or both) is the only part of the paint process (primer,paint, clearcoat/lacquer) which is non-porous or in other word, waterproof.
@M_V started
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I'm sure I read that primer (not sure if this applies to grey. red oxide or both) is the only part of the paint process (primer,paint, clearcoat/lacquer) which is non-porous or in other word, waterproof.