Paint Chalking Aluminum Siding

First it seals the aluminum to prevent the chalky oxidation from happening under your paint.

Paint chalking aluminum siding.

This is called chalking and essentially is the existing paint breaking down from the weather. Then paint with two coats of acrylic paint. Oil based paints tend to chalk more than latex formulations. A siding brush has soft bristles that won t scratch the paint or gouge the aluminum like other hard brushes.

It doesn t take much effort to scrub away the debris once the tsp has loosened it up. If you need to paint aluminum siding choose a day when the weather is at least 50 f 10 c and dry since moisture from rain or dew will ruin a new paint job. Scrub off the chalk with a strong solution of water and spic and span or tsp detergent or a nonphosphate tsp alternative. There are several steps in dealing with a chalky surface to ensure a long lasting paint.

Aluminum should be painted with a self etching primer designed for metal. Second primer creates a uniform surface that is ideal for paint adhesion. In this video toh expert shares his tips and demonstrates how you clean and prepare the surface for painting. Primer does two important things.

Some exterior paints such as those used on aluminum siding intentionally chalk for self cleaning. Use of a low grade highly pigmented paint. Inspect the siding for mildew powdery paint pigment and mildew. This oxidation that occurs on aluminum siding results in the build up of a chalk like substance on the siding itself which can easily be seen by wiping your hand across the aluminum.

Coat your roller in primer and roll quickly and evenly along the panel of siding then roll backward in the opposite direction. Steps for painting aluminum siding 1. The key to painting aluminum siding is to get it. If after two tries of hand scrubbing or power washing there is still chalk on the surface simply use a primer before repainting the aluminum siding.

Have you ever wondered if you can paint aluminum siding. Chalky surfaces will cause the paint not to adhere correctly to the surface and will cause premature peeling. Rub siding with cloth to check for powdery paint pigment and mildew. Use of an interior paint for an outdoor application.

Not adequately sealing a porous surface. If your aluminum siding has developed a chalky residue or is faded stained or just plain the wrong color fear not. If the paint color comes off on your hand the paint is chalking. Primer is one of the most important steps when painting aluminum siding.

One of the hardest surfaces to prep is a aluminum or vinyl siding that is chalky. Factory finished siding can develop an excessively thick chalk layer and may require power washing to ensure complete chalk removal. Wipe the surface with the palm of your hand. This primer will cover up the chalk and allow the new paint to bond with the aluminum siding.

The primer should be 100 percent acrylic and specifically manufactured for outdoor painting. You can paint it.