Aluminum is the perfect metal to use for motorcycle parts because of its strength and weight. Although it can tarnish, it does not rust through like steel. However, if left unpolished, aluminum parts can become scratched, dinged, and tarnished. Tarnished and scratched aluminum can ruin the appearance of your motorcycle. Fortunately, aluminum is easy to polish, and can be buffed to look as shiny and beautiful as chrome.
Apply varnish stripper to a cloth and rub the varnish off the motorcycle parts--aluminum parts have a protecting varnish that has to be removed before polishing.
Wash the parts with car soap and water. Dry the parts with a towel.
Sand all scratches with sand paper until the surface of the metal is smooth. Use even strokes to sand the aluminum. Sand the metal until it is completely smooth.
Apply aluminum polish to the cloth and rub it onto the metal using slow, circular motions. The cloth should turn black as you rub in the polish: This is the aluminum tarnish coming off of the parts. Make sure every part is well polished. Buff the metal dry with a towel, removing all of the polish residue.
Place masking tape around the edge of the motorcycle body, and tape thick paper around the body closest to the aluminum parts. Spray a coat of clear varnish on the aluminum parts, using a clear varnish spray can. Apply the spray in even back-and-forth motions. Let dry and apply one more coat. This clear coat will keep the aluminum from tarnishing, keeping it bright and polished.
