Ok to use differant brands of paint on model

Al is perfectly correct that any paint can be overpainted with another once it is fully CURED.

Just to clarify, dry to the touch is not an indication of cured, as only the surface is dry. Some paints may take a month to be fully cured. It is always a good idea to keep a closet queen on hand to test before commiting yourself.

MikeV wrote:

Khalee2 wrote: Yes Im just talking about overpainting,not mixing. And I did not know about the other one as I've allways heard you could not paint enamels and acrylics over each other as bad things would happen. But that is good to know. Thanks.  Any paint can be sprayed over another if done correctly but many people don't know the tricks so it is best to put the "hottest" paints like lacquers on first.  Many people spray Testors Dull Coat over enamel finishes and Dull Coat is lacquer based.

And I routinely airbrush Testor's Dullcoat thinned with DIY store generic "paint thinner" over acrylics with no problems. I apply, when needed, oil washes thinned with the same thinner over enamels and/or acrylics with no problems. I don't scrub my washes, however. Bottom line, in 30+ years experience, once a paint is fully cured, you can do almost anything to it.

Khalee2 wrote:

Yes Im just talking about overpainting,not mixing. And I did not know about the other one as I've allways heard you could not paint enamels and acrylics over each other as bad things would happen. But that is good to know. Thanks.

Any paint can be sprayed over another if done correctly but many people don't know the tricks so it is best to put the "hottest" paints like lacquers on first. 

Many people spray Testors Dull Coat over enamel finishes and Dull Coat is lacquer based.

If you airbrush paints, watch out for the thinner you use. I have had MM acrylic gum up with other brand of thinner. When you switch paint on the same airbrush, it must be thoroughly dry before the next color.

Are you talking about mixing paints or applying one type/brand over another?

When mixing paints, preferably, stick to paints of the same manufacturer. You can't mix acrylics and enamels.

If overpainting, you should be able to overpaint any brand of paint with any other (though one should try to avoid overpainting enamels/acrylics with lacquers if at all possible)  You can overpaint enamels with acrylics (and vice versa) as long as the layer being overpainted is fully cured (at least 24 hours)