1) Since you will need to work with chemicals, make sure to put on some rubber cleaning gloves before you start. You can use regular kitchen gloves for this job. If you are one of those people with sensitive skin it is important to take this precaution as the chemicals that will be used can irritate your skin not to mention cause unnecessary dryness.
2) Take a bottle of specialized aluminum cleaning solution, which can be easily purchased from your local automotive store, and start by spraying a thin layer across the entire aluminum rim. Make sure that the cleaning solution you purchased is safe to use on rims that have been factory painted, anodized or have a clear coat finish. If you use the incorrect type of cleaning solution on your rims it will strip the aluminum finish right off.
4) Grab a soft towel and gently wipe the entire rim’s surface to remove all the excess dirt and debris. Do not apply too much pressure, since scratches may result from small rock or dirt particles that are stuck underneath the towel as you are wiping.
5) Take your garden hose and rinse your aluminum rims from side to side and top to bottom. This motion which starts from the top of the rim will cause all the dirt and debris to rinse downwards off the rims and onto the ground.