OK. This is new diamond plaster. Been up about 8 months. I have misted the plaster with the cheapest flat paint water mix. Then i Put on a Second primer coat with zinsser's bulls eye 123. Now, I am wondering if that was ok. If it seals stains, will the plaster still breath? I used two coats of primer because of using filler, plus it is almost the same color as topcoat. I didn't want the filler to spot thru.