Answer for How can you tell if inside trim paint is oil base or latex?

RUB DENATURED ALCOHOL ON THE AREA, IF THE PAINT IS SOFT OR COMES OFF IT'S A LATEX PAINT, IF IT STAYS THE SAME IT'S OIL BASED.

  • By Anonymous
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Answer for How can you tell if inside trim paint is oil base or latex?

As has been stated in this forum, preparation is the key. The denatured alcohol test is by far the most simple test. After the oil/latex determination, visit your local paint store to get their recommendation on the appropriate primer / finish system. Acrylics, with the proper prep, are a fine interior finish over previously painted surfaces.

We have begun to use the new waterbourne finishes with great results. Several of these products combine the durability of an Alkyd finish with the ease of clean-up and resistance of yellowing of the acrylic finishes.

I will caution that the waterbourne finishes are not your grandmother's coatings. Expect a learning curve the first few times these products are used.

I apply them on cabinets or trim and am getting great results. I must teach my painters the application process as these coatings can not be applied as liberally as most other interior coatings.

  • By JT Creations, LLC
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Answer for How can you tell if inside trim paint is oil base or latex?

It has been my experience that latex WILL NOT STICK to oil base paints. I have painted many historic homes and they have all had old oil base paints on the trim. I learned the hard way that latex will not stick to oil base.

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Answer for How can you tell if inside trim paint is oil base or latex?

Stick it with Acrylic

With the advances of acrylics in the last ten years and present day technology, a good sanding and proper prep, acrylic paints will stick to most surfaces better than oils. (ie. aluminum, masonry, oil based finishes) Oil based alkyd formulation has not changed in fifty years, but you still can't beet the look and feel of a good hand brushed oil finish.

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Answer for How can you tell if inside trim paint is oil base or latex?

Amazing! This really does work.

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Answer for How can you tell if inside trim paint is oil base or latex?

AGREE

  • By Anonymous
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Answer for How can you tell if inside trim paint is oil base or latex?

That really helps us to see what the walls are… latex or oil.. We just moved in the summer and not knowing whats on the wall.. Everyone should look into that before painting.

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Answer for How can you tell if inside trim paint is oil base or latex?

The easiest way to do that is try it with your thumb nail (not too hard)if it leaves a dent its latex if it is hard and doesn't dent its oil. I don't know about the rag with alcohol, oil paints degrade faster than the acrylics so it should leave a stain on the rag easier.

  • By Anonymous
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Answer for How can you tell if inside trim paint is oil base or latex?

Here is a simple test that works really well.

Use a clean cloth, painters rag, and denatured alcohol. Apply the alcohol to the cloth and gently rub the surface. If any paint is softened or removed then the finish is an acrylic or latex paint. If no color is on the rag and the finish is still unaffected then it is an oil base.

Use a white rag for checking dark colors and a dark rag for light colors. This will make it easier to see any removed paint.

Denatured alcohol readily dissolves acrylic and latex paints but leaves oil base paints alone.

Acrylic, latex, house paints cannot be applied over Alkyd, oil base, finishes without being primed first. However an Alkyd, oil base, house paint can be applied over an Acrylic, latex finish.

  • By crowderpainting
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