Painting Galvanized Panels

They have an etching wash just for galvanized metal. Check at a large paint supply store and you should find what you need. Years ago we used to wash galvanized panels with vinegar before applying the primer or allow it to naturally age out in the sun. Now they have better methods.

X2 on etching before painting, even with epoxy. Not sure why you would think we know more than the instructions.

Vinegar will neutralize galvanizing acids.

no etching with epoxy primer, yes vinegar was used at one time. I did find the dry time and sanding. Don't know why someone wrote 2-3 days sanding. Obviously I didn't think you would know more than the instructions, maybe someone here has use this product???

Deano56 wrote:
no etching with epoxy primer, yes vinegar was used at one time. I did find the dry time and sanding. Don't know why someone wrote 2-3 days sanding. Obviously I didn't think you would know more than the instructions, maybe someone here has use this product???

Well, like most paints, there is a certain amount of time that it takes to dry/cure. Lacquer sets up very quickly and some enamels can take 30+ days to fully harden. I am assuming that the epoxy primer that you are using just takes 3 days to cure to the point that it can be sanded in preparation for the top coat. I used epoxy primer on an airplane that I painted and I let it set for a week before doing a quick sand. This was on aluminum which may be different than galvanized steel.