Etching Primer provides a thin zinc coating that (slightly) penetrates metal surfaces (aided by the phosphoric or sulfuric acid etch), inhibiting rust problems. It should be used only on bare metal. It's recommended here is a variety of threads for a variety of uses.
Epoxy primers are catalyzed (two part) primers for use on bare metal. It's recommended her too.
Can or should epoxy primer be used OVER an etching primer coating?
Should either (or both) be followed by a high-build primer to make a smooth surface?
Robert
Epoxy primers are catalyzed (two part) primers for use on bare metal. It's recommended her too.
Can or should epoxy primer be used OVER an etching primer coating?
Should either (or both) be followed by a high-build primer to make a smooth surface?
Robert