I repainted my brick porch because the original paint was starting to come off in the high traffic areas. It looked great for a few days, but then there was a heavy rain which severely discolored the paint. It was a bright white and now it is a yellow beige, presumably from pollen. I was told the pollen shouldn't be a problem as long as the surface was clean before painting and the paint was dry (there was no rain for 2-3 days after painting). What should I do now? Apply another coat of paint? I used a high quality masonry paint. Should I be using some sort of sealer? There was no discoloration to the original paint which has been there for a few years.