It would more than likely peel in sheets once cured. You can however begin with an acrylic/latex primer and then paint it again with an acrylic/latex paint. Sanding the oil coating will aid in adhesion, and wiping down with a degreaser is sometimes necessary in kitchens, or nicotine polluted rooms. Or any room with condensation issues.
No, you either need to really rough up the oil paint with fine sand paper, or put a base coat on before you paint with your Latex paint. If you don't your Latex paint won't adhere.
Yes
Your ceiling may have been oil based, or really anything other than latex. If you used latex primer over oil then there is really nothing you can do except remove it and get a super low gloss oil base.
Yes it can.
yes but not the other way around the latex passes moisture
The ceiling adapter is white but simulates wood. Can be painted over to any color desired.
Yes, oil based paint is very versatile and can be painted over many painted surfaces, including those previously coated with latex paint, as long as the surface is dull and clean.
Just paint it on if the latex is adhering well.
Yes, you can generally paint high gloss latex over flat latex paint. But you must do all the preparation work in the best tradition of any professional painter. All "flaking" must be removed and the raw wood primed. This will present a "smooth" surface for the new coating. Additionally, everything that is to be painted my be scrupulously clean and free of anything that will restrict the new latex from sticking to the old.
There are some water based coatings that will adhere to an oil based surface without using a primer; however, an oil or acrylic-based primer, used as a bridge, will allow you to paint latex over an oil-base paint trouble free.
On the ceiling of the Oval Office is a painted Presidential Seal. Over the fireplace hangs a porthole portrait of the first US President George Washington by Rembrandt Peale painted in 1776.
Yes, you can.