Treating Aluminum Before Painting

Before you paint aluminum it is important to prepare the aluminum so that the paint will adhere to the material.

Treating aluminum before painting. Rinse it thoroughly with clean water and pat it dry. I think 400 is too fine for paint to get a bite into metal. If the area is small sandpaper will work just as. Any dirt or grime that is on the aluminum will cause the paint to easily slide off the material.

Wipe down the etched aluminum with warm soapy water. Use a sander if not all of the paint came off with the water. In order to achieve a quality painted finish on bare aluminum you must first clean the metal with pre painting prep or some type of solvent. The siding must be clean to.

If you are working with bare aluminum skip to step 3. Old paint that is not removed will result in the new paint quickly peeling off wasting your time and effort. The best way to address these issues is to repaint the siding. How to prepare aluminum for painting step 1.

Next go over the aluminum with 320 grit sand paper on a da sander. How to paint aluminum with vinegar. This will remove dirt and contaminants from the surface of the metal. Acid etch primer is more for corrosion prevention but i am not sure if it helps on aluminum or not.

This step can be done by hand but for the best results a da sander should be used. I use ppg cre primer it is an epoxy and an acid etch as well. Remove the old paint. I suggest a good roughing with 320 paper a good epoxy primer.

Your paint peeling is a sign of poor prep.