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Assuming that you mean an oil based enamel, it's because the surface is too hard and smooth for the latex paint to adhere. You'll need to sand the surface to create small gouges for the paint to flow into to so that when the paint dries, it has something to hold on to.

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Q: Why cant you paint latex over enamel?
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Related questions

Can you paint over enamel with latex?

you can paint over latex paint with latex enamel.


Can you use latex primer over oil base enamel?

Not directly. You will need to use a primer made to adhere to oil and will accept a latex topcoat.


Can you paint enamel over latex?

Enamel is a word used to describe a finish, not the formulation of a paint. It simply means a hard reflective surface. Many people mistakenly use the word enamel when referring to oil based paints. So. if you are asking if you can paint latex or acrylic paint over a latex or acrylic enamel the answer is yes, however, I strongly recommend you sand the old paint first to give the top coat "tooth". If you are asking about painting latex or acrylic over an oil based paint the answer is still yes, however you must first sand the old paint and apply a good quality primer to it. Check with a reputable paint retailer for the best brand in your area.


What can you use to paint over enamel paint on the walls?

You can use either enamel (oil-based) paint or latex (water-based) paint. If you are using latex paint, you need to use a primer (undercoat) first. The paint store will have a special primer that allows you to paint latex over enamel. If you are going to do this, it is also a good idea to either sand the enamel paint before you paint over it, or wash it with TSP (trisodium phosphate) cleaner to remove the gloss.


What kind of paint can you put over all surface enamel latex primer?

You can use either a water or oil-based paint over a latex primer.


Can you paint Windsor Newton artist oils over latex enamel?

Yes, you can.


Can you paint enamel paint over enamel paint?

Yes you can paint enamel on silver. The problem will be that the paint will not be permanent because the process of enameling on silver is one involving heat. Since you won't be using enameling pigments because it is standard paint, the paint cannot combine into the silver.


Will latex acrylic fix flashing in eggshell enamel paint?

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.


Can you use enamel over latex?

Do you mean oil based enamel, or alkyd enamel? It can, but you will have to prime it with a barrier coat of compatible primer for the new paint to stick to it. I would not recommend it though. If the latex paint has been around for a long time, you have a better chance of having your new paint last. Is this inside or outside? Is it exposed to temperature extremes? The latex paint will be able to expand and contract more than the oil based enamel. If you can imagine putting paint on a latex glove, letting it dry, then putting the glove on (stretching it) then you will have a good idea (although much more extreme) of what you are asking the paint to do. If you really must put an oil based enamel on top of latex. Use a good oil based enamel like Kilz or Zinnzer Bullseye before you paint it. After you put the barrier coat on, you will have a limited time to get the other paint on....check the directions.


When painting iron fence can you paint enamel over latex?

You can paint over latex paint with either an oil or water based enamel paint as long as the surface is dull, clean and rust free. Any bare metal will need to be primed with a primer, either oil based or 100% acrylic Direct-to-metal, prior to top-coating.


Will enamel paint go over acrylic paint?

If you are painting a residence the chances are your enamel is a water borne acrylic enamel. Conversely, if you are referring to acrylic and enamel spray cans then the answer is yes you can spray one to another without any problems. Always be sure your paint is completely dry before applying successive coats.


Can you put enamel on lacquer paint?

Lacquer can cause the paint to bubble or crack due to the very hot solvent that is a part of lacquer. If you want a clear coat over paint, a better choice is spar varnish over oil base paint and arcylic urethane over latex.