Prep Like a Pro: FAQ

By: Columbia Coatings Staff

Published: June 2, 2026

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Welcome to our Frequently Asked Questions page! This resource is designed to evolve alongside our progress and community needs. We’ll be updating this page regularly with new information and answers, so be sure to check back often for the latest updates.

Why does prep matter?

Prep matters because almost every common powder coating failure starts before powder is ever applied. Peeling, fish eyes, adhesion problems, corrosion under the coating, premature failure in the field. These are not powder problems most of the time. They are prep problems.

Powder coating works by bonding to a properly prepared metal surface. If that surface has oil on it, the powder will not stick correctly. If the surface has old coating still on it, the new coating bonds to the old coating instead of the metal. If the surface has not been chemically converted, the powder sits on top instead of bonding into the metal.

Prep is what turns a raw or used part into a surface that powder can actually adhere to. When prep is done well, coatings last. When prep is skipped, rushed, or run with the wrong chemistry, the failure shows up later, usually in a place that costs you money. Warranty calls, rework, customers who do not come back.

That is why prep matters more than most shops give it credit for. It is not glamorous. It is not the part anyone takes photos of. But it is the part that determines whether the work actually holds up.