Painting Over a Powder Coating

Monday, November 17, 2014 | Labels: , , , , | | Painting Over a Powder Coating

One of the most common uses of power-based paint is in vehicle restoration. Once a car or truck is sandblasted, the bare metal will begin to rust. Power coating paint is applied to all surfaces to retard the rust and give the restorers plenty of time to complete the needed work. But unless it is done correctly, applying a finish paint job on top of a powder coat can lead to an imperfect surface and a ruined paint job.

Instructions

    1

    Wipe down the entire powder-coated surface with a soft, dry cloth, making sure to completely remove all dust and other blemishes. If needed, use a damp cloth and some mild, soapy water to remove stubborn contaminants. Allow to air dry.

    2

    Sand the entire surface lightly with sandpaper. The goal is to get rid of any peaks or blemishes in the powder coating, without removing it entirely. Make sure to sand every corner and edge evenly. One way to ensure a soft finish is to run the palm of your hand across the surface, checking for irregularities.

    3

    Paint the sanded surface with the paint of your choice. While you can use a paint brush for this step, using a paint sprayer will give much better cosmetic results. A sprayer will also be much faster, especially on larger projects. If you have not previously used a sprayer, you may need some practice in order to properly paint a smooth surface. Use a spare piece of metal or an unwanted item as a practice item. Then press the trigger on the sprayer as you sweep smoothly across the item, over spraying the item on each end in order to ensure there are no gaps or rough edges in the paint.

    4

    Allow the paint to dry, according to the manufacturers suggested timeline. If you are painting a second coat, youll need to lightly sand the surface again, it order to provide the proper surface adhesion for the new layer of paint.

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