Does flat paint seal metal?

[VT Woodsman]

Ive heard rumors that flat paint lets moisture get to a metal surface. I understand how a high gloss paint repels water, but i wonder about flat. I know rustolium makes flat camo colored paint for metal use, so i guess it would be impervious to water and moisture.??

 

[PaRenegade]

There should be no difference in it's moisture protection, no matter what color. Even with clear. The more important issue is that it's exterior paint and not indoor paint; and it's for on metal.

 

[mtnwhlr]

The best way to seal the metal is use a metal etching primer before you paint.