It will take a while but you will be able to get the scratches out. It is not paint.

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How to remove scratches from powder coated aluminum. The scratches do not go very deep. If so what is prepared method and products i need. Removing stains in powder coat. If the door is. The cloth should be given a mild pressure over the item as un necessary pressure could damage the powder coating. Remember powder is melted plastic resin and metallic charged fillers.
So is there a way to buff these out. The powder coating is typically an epoxy or polyester material spread over the surface of the aluminum and then allowed to harden. Squeeze out the solution from the cloth until it is damp and not wet. Grind repair area with a power hand grinder or wire brush to bare metal. If you need to clean the surface we always suggest to start with soapy water and a lint free rag or a brush to attempt to. Buff out yes with a wax and an orbital buffer but do not use a high setting or any type of cleaning wax.
Fine grit sandpaper is recommended as coarse grit paper could leave noticeable scratches on the surface. Speak with your aluminum door retailer to see what the gloss level is of the door. Apply this solution with a soft cloth onto the surface. Powder coatings come in a variety of different gloss levels with some coatings that are flat while others are shiny. Needless to say when i say the surface scratches i flipped out. Wet a cloth in water and rinse the whole surface of the powder coating generously.
Even a powder clear is still not something you can compound out. Scrubbing the surface with sandpaper can remove the more stubborn chipped powder coating. The idiots at my local shop decided to rough up the black powder coated barrels of new wheels so that the balance weights would stick better. Use a finishing wax.