Is it okay to paint an oil base paint over latex paint?
Question:
Answers:
Oil base paint over latex will work fine if the latex is in good condition. Proper cleaning is a must, generally wash with 1 cup tri-sodium phosphate to 1 gallon of water, scrub just a bit and rinse well. The surface of the latex will tend to absorb just a bit of water in the cleaning, this must completely dry out before coating with oil paint -- 2 - 3 days, depending upon heat and humidity.
It will work, but I really can't think of any reason you would want to. There are few places that oil will perform better than latex. You will not realize some of the benefits of the oil in these situations due to the latex underneath. The oil will be much more difficult to deal with, both application and cleanup. You would be much better off with a latex.
For what it's worth, latex over oil is not a problem either with proper preparation.
Read your update -- I would not use oil base paint inside, even in a bathroom. There simply is no reason. When latex paints first became available, they did not hold up to moisture as well as oil based paints. Both oil and latex paints have been significantly reformulated since then, oil based to comply with environmental regulations, latex to improve performance. The end result is that many latex paints perform as well or better than oils in a bathroom. Look for a latex with a high acrylic content, some brands even have this type of paint labeled for kitchen and bath use. It will perform as well and is much easier to deal with.
Yes... it's the other way around that doesn't always turn out so good. Just make sure it's nice and clean first.
I wouldn't recommend it. Oil base paints need to soak in to the surface (most commonly wood) and take a lot longer to dry than latex paint. If you paint over latex paint with oil paint, you will make more work for yourself in the long run. Also not a god idea to paint latex over oil based paint. I found this out the hard way. I have now learned not to mix them when re-painting.
Yes, but you can't paint latex over oil. Once you paint with an oil based paint...it will not absorb water based anymore, so whatever you are painting be sure that you won't want to go back to latex. Usually anything inside will be water based (latex) but when staining a fence or deck...you want oil based; hence...it can't absorb water. Good luck!
No. there is no good reason to go back to an oil at this point. The benifits of oil will not be there. There is only one applications that an oil would be needed and that is on an exterior with multiple coats with both oil, latex and whatever else. This is where I would top coat with oil.
More Related Questions & Answers...