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Long Range Hunting & Shooting
Paint Primer cracking!
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<blockquote data-quote="buzzgun" data-source="post: 623424" data-attributes="member: 6372"><p>I spent about 10 years in the chemical coating industry, mostly dealing with automotive and chemical coatings....</p><p></p><p>The defect in the photo above is not from contamination.......contamination does not cause the type of "cracking" your photos show. What I am seeing in your photos is called "lifting" and is caused by the solvents in the fresh primer penetrating the previous coat of paint and causing it to swell.....or, the undercoat is absorbing the solvents and they are trying to come out after the primer is dry on the top.</p><p></p><p>Basically, your primer is incompatible with the previous paint........you either need to strip the stock, or sand it smooth and find a water based primer/sealer to seal the undercoat from the new topcoat and prevent the solvent of the new topcoat from penetrating into the substrate.</p><p></p><p>If it was mine and I wanted it done right, I'd strip the stock and start over.</p></blockquote><p></p>
[QUOTE="buzzgun, post: 623424, member: 6372"] I spent about 10 years in the chemical coating industry, mostly dealing with automotive and chemical coatings.... The defect in the photo above is not from contamination.......contamination does not cause the type of "cracking" your photos show. What I am seeing in your photos is called "lifting" and is caused by the solvents in the fresh primer penetrating the previous coat of paint and causing it to swell.....or, the undercoat is absorbing the solvents and they are trying to come out after the primer is dry on the top. Basically, your primer is incompatible with the previous paint........you either need to strip the stock, or sand it smooth and find a water based primer/sealer to seal the undercoat from the new topcoat and prevent the solvent of the new topcoat from penetrating into the substrate. If it was mine and I wanted it done right, I'd strip the stock and start over. [/QUOTE]
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Paint Primer cracking!
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