The flat latex paint will stick to satin or semi-gloss latex paint without any problems. The main consern is making sure the surface is clean and sound before begining to paint, plus use top quality paints for the best results.
Yes you can. Latex refers to what base the paint is. Latex is water based and therefore can be cleaned up with water. Oil based paint is cleaned with a chemical. Flat refers to the sheen of the paint. Flat is dry and chalky looking. The next step up is eggshell which has believe it or not has the shine like an eggshell. It is the most common interior wall paint. Anything above that gets shiny. The more shine the more the flaws in the wall show.
You do get flat enamel paint so you have to check if the coating is a water based or solvent based coating before you even consider mixing!
with proper prep like sanding gloss to where you see no shine or using primer. they also make a product called esp or tsp you just wipe on but this does not work well.
I wouldn't use old paint that may have separated. Buy a primer.
As long as the base is compatible, oil over oil or latex, latex only over latex, you can cover an eggshell paint with a flat paint.
Should be deglossed and primed first.
Flashing occurs when a surface has not been properly sealed, so a latex acrylic primer applied over the surface first will keep an eggshell enamel paint from flashing.
Yes, you can put polyurethane paint over eggshell in latex or eggshell in oil.
Latex paint can be used as a primer but the results may not be what you want. Primer is less expensive than latex paint and has special qualities that create a seal and help the finish layer of paint adhere better. In the long run you will save time and money by using the correct product for the job.
You can, but don't need to use additional primer.
Not directly. You will need to use a primer made to adhere to oil and will accept a latex topcoat.
Flashing occurs when a surface has not been properly sealed, so a latex acrylic primer applied over the surface first will keep an eggshell enamel paint from flashing.
Yes, you can put polyurethane paint over eggshell in latex or eggshell in oil.
Either oil or latex primer can be used over interior latex paint.
Latex paint can be used as a primer but the results may not be what you want. Primer is less expensive than latex paint and has special qualities that create a seal and help the finish layer of paint adhere better. In the long run you will save time and money by using the correct product for the job.
Latex.
You can, but don't need to use additional primer.
Not directly. You will need to use a primer made to adhere to oil and will accept a latex topcoat.
It's primer made with a latex or acrylic base. You can use any kind of paint over this.
You didn't mention whether you were using latex or oil based primer and paint, but generally the point of using primer is so that you can paint over it with any form of wall paint. Just read the label on your primer can to make sure it is compatible. On the other hand, if you wanted to paint the primer over the satin gloss, you need to sand the surface lightly to remove the sheen of the paint and provide a suitable surface for the primer to adhere properly.
You can use either a water or oil-based paint over a latex primer.
yes. However, you cannot use an oil base paint over a latex primer. If you change your mind on the paint, you must strip the paint before you use an oil based paint on the primer.
Egg shells (used in many craft projects) are quite porous, and will give your paint an excellent ground. Remember however a flat paint will not be very durable (it should not be washed or cleaned) so consider a clear top coat in what ever gloss factor you like. If however if you are asking about the paint finish called eggshell (one having the ability to be gently washed) then it will depend on the age of the "eggshell" paint, the composition of the two (eggshell & flat) paints and the colour of the "eggshell". If the "eggshell" is older than a year, latex or acrylic based and a light colour, then a good washing with TSP or some other gloss remover, and going over it with one or two coats of a good quality flat latex, oil or acrylic paint should do the trick. Oil paint can be directly applied over latex, acrylic or oil... Latex can be directly applied over latex or acrylic but not oil... Acrylic can be directly applied over latex or acrylic but not over oil. If the "eggshell" is less than a year old, oil based or a deep colour, then a good quality primer coat will make the job go much smoother. (Note- use an oil based primer if the "eggshell" is oil based, you can then top coat with any paint formula)