If you have a damaged alloy wheel, there are a few different ways that you can repair it. Depending on the severity of the damage, you may be able to simply buff it out or you may need to replace the entire wheel.
If the damage is just a small scratch or chip, you may be able to buff it out with a polishing compound. If the damage is more severe, you may need to sand down the area and then repaint it. If the damage is really severe, you may need to replace the entire wheel.
If you are going to try to buff out the damage, it is important to use a soft cloth and to move in small, circular motions. Start with a coarse compound and then move to a finer one. Be sure to rinse the area well and remove all of the compound before you move on to the next step.
If you are going to need to sand the area, you will want to start with a coarse sandpaper and then move to a finer one. Be sure to remove all of the sanding dust before you move on to the next step.
Once you have sanded or buffed out the damage, you will need to repaint the area. Be sure to use a paint that is made for alloy wheels. Apply the paint in thin coats and allow it to dry completely between each coat.
If you have replaced the entire wheel, you will need to follow the instructions that came with the new wheel. Be sure to torque the lug nuts to the proper specification and to never drive the vehicle until the wheel is properly secured.