How do I paint over oil based paint on a popcorn ceiling with flat paint without sanding it.?

Portion of popcorn ceiling was repaired due to leak and previous owners painted repaired section with oil based paint. The rest of ceiling is painted with a flat latex ceiling paint. I primed over the oil based area before painting entire ceiling with flat latex but I can still see where the oil based paint was. Other than having the entire ceiling re-popcorned is there any way to cover this area.How do I paint over oil based paint on a popcorn ceiling with flat paint without sanding it.?
Spray it.How do I paint over oil based paint on a popcorn ceiling with flat paint without sanding it.?
Since the popcorn has already been painted it is impossible to remove otherwise I'd suggest to do that - that sucks. Did you use an oil-based or a latex primer? If you used a latex primer, that would be the problem - an oil based primer should cover it. Use Kilz - the original one(not Kilz2) or Bullseye (Zinser brand). Paint the ceiling - if at all possible - with an airless sprayer for the best results. Personally, I think whoever invented that popcorn crap should be hung by his toenails!
not all primers are sealers, you need to apply a primer --sealer, like kilz, to the affected area, might take 2 coats, then paint the ceiling with a good quality ceiling paint, also if the popcorn is very old it may try to peel off when you are rolling the paint on, spraying will solve this problem, but every thing in the room will have to be removed , and the walls covered with visqueen, to prevent over spray from getting on them
use kills on the whole area, then repaint.
Don't rule out redoing the popcorn. It's easy.





1) Put dpown drop cloth





2) Scrape off the old stuff with a sharp scraper mounted on a broom handle.





3) Spray on new popcorn using an aerosol-like spray can. (Check home depot for this)





4) Prime %26amp; paint