Monday, September 13, 2010

Prep Cast Aluminum For Paint

Cast aluminum is used in a variety of outdoor and indoor applications. Everything from architectural detail pieces to gas grill bodies can be cast from aluminum. The casting process makes the aluminum last for years indoors or outdoors. It's resistant to oxidation and rust, but extreme temperatures and weather can have a negative effect on its surfaces. Painting cast aluminum provides an additional protective barrier and extends its useful life when the surface is prepped properly.


1. Remove any built-up grease, rust and dirt by lightly scrapping it with a wire brush. Do not apply enough pressure to mark the cast aluminum. Penetrate only the built-up grime with the wire brush bristles.

2. Degrease the entire surface by applying a degreasing cleaner formulated for cast aluminum. Such a cleaner is available at any grocery, automotive or hardware store. Follow the package instructions for application instructions.

3. Clean the aluminum with a sponge dipped in a solution of equal parts white vinegar and water to remove any chemical residue left behind by the degreaser.

4. Tape any of the areas that are not to be painted by wrapping them with painter's tape.

5. Apply two to three coats of primer to the cast aluminum. Follow the primer manufacturer's application instructions. Spray-on primers work well with the sculpted details of cast aluminum.

Tags: cast aluminum, application instructions, cast aluminum, wire brush, with wire