Should I paint galvanized vent caps?

[mtnbbud]

I'm replacing my plastic pipe vent caps with galvanized metal caps. Should I paint them before or put the on, or with the galvanization be enough?

If I do paint them, does anyone have recommendations for which paint to use and prep work. There's a small bolt and nut on the top of these. I'm thinking cover these with some Dicor?

[enblethen]

One or two coats Rust-oleum or Hummerite paint. Big issue is to neutralize the galvanizing using cheap white vinegar. Use stainless screws for mounting.

[mtnbbud]

Thanks all for your input. I believe the original plastic covers made it 30+ years, but I figure I might as well be sure and paint them if there's a chance they will eventually rust. There's a Sherman Williams paint store near my house. They should know what primer and paint I should use. I might even bring along the caps when I ask them. Better to play it safe than to have to replace them in the future...

[Community Alumni]

I worked at a hardware store and if I remember there is a primer or paint made for Galvanized metal

JimR

[enblethen]

I would suggest painting with a good quality paint. Make sure to wipe down with vinegar to get good adhesion. The thin metal of your cap is most likely electro-galvanized and not hot dipped. Electro-galvanizing doesn't last!

[C_Schomer]

So many paints won't stick. Do what tinners do... wipe galvanized metal with vinegar to etch it. Craig

[wildtoad]

The only reason to paint them is if you want to have them match the pipe or other rooftop parts.

[TenOC]

Galvanized steel will last for 10+ years without rusting. Do remember the old metal galvanized steel garbage cans?