Yes.
Base paint is also known as flat paint, or flat wall paint, or matt paint and is a latex paint. Flat paint is just that, flat or dull with no sheen at all. Semi-gloss is an enamel that dries very hard and can be found in a low sheen (satin) a medium sheen (semi-gloss) and a high sheen (high gloss) Flat paint is usually used on walls and ceilings where as semi-gloss is used in kitchens, bathrooms, doors an jambs because it helps hold back the inherent moisture in those areas.
No, you can dull satin or semi-gloss but not the reverse.
Can I paint semi gloss over flat paint? Thanks!Barbara Phillips
semi gloss
If the question is: What is the ratio of high gloss paint to flat paint sold, the answer is 57:33.
As long as you find that aesthetically pleasing, I don't see why not.
That is up to you. The more gloss a paint has in it, the easier it is to clean and the more abuse it can take. For the most part, ceilings are only flat.
Only if the 'flat paint' is water based too.
Yes. You'll want to ensure that the surface is clean and gloss free prior to applying the flat topcoat.
yes you can, prep it first light rub down and apply two coats of the flat paint.
Yes, it will.
Yes. You can paint semi-gloss latex paint over flat latex paint. It is not advised to paint over any latex with any oil-based paint. Nor is it advised to try and paint over semi-gloss paint with any other finish without first de-glossing the finish and priming.