Want to apply a black wash, what's better to seal the paint?
A gloss coat or dull coat?








~ Jeff

Pin wash (accent details, rivets, panel lines, etc)? Best to use that over a fully cured gloss coat. Flat coats will "soak up" the wash since a flat coat is basically microscopic valleys and peaks (to diffuse light). Your wash could easily turn it into more of a filter (changing the entire base color). At least that's is what has happened to me in the past.

That said, beware of tide marks when using either a gloss or flat coat, but particularly a gloss. The same propensity to keep the color in a particular area tends to have it be pretty heavy and not blend well into the surrounding areas.