I painted my ceiling with Behr Ceiling Paint and a good Purdy roller. When the paint dried the ceiling looked blotchy as if spots were missed all over the ceiling. What could cause this?
Apparently the substraight was less than perfect… you now need to Prime all using a Pigmented Shellac Sealer Primer, then finish coat, but use Sherwin Williams Classic-99 acrylic (use a flat sheen for most surfaces)… also when you ROLL… are you "working" the roller, trying to get coverage? This is a no no… let the Paint "flow" generously as you Roll… Learn Proper Rolling Technique here: <a rel="nofollow" target="_blank" href="//davmagic.com/paint/PAGES12.html">//davmagic.com/paint/PAGES12.html</a> and here: <a rel="nofollow" target="_blank" href="//davmagic.com/paint/PAGES15.html">//davmagic.com/paint/PAGES15.html</a>