07/05/2026
Metal surfaces are non-porous and often have mill scale, rust, or oil residue. Without the right primer or with the wrong one your topcoat has nothing to bond to. What you get: peeling, bubbling, delamination, and rust bleed-through. The finish isn’t the problem. The prep is.
Disclaimer : Primer type varies by metal, environment, and finish system. Always consult your paint manufacturer’s spec sheet before application.
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