Wanna be really simple about it? Just use a Scotch-Brite pad and you will be fine.

http://www.shop3m.com/61500123239.html

These are great for prepping wheels for paint too. Just make sure you clean the surface well afterward to remove impurities. I recommend Prep-Sol and some tack cloth.

http://solutions.3m.com/wps/portal/3...gl6LR3C821Z4bl

http://www.createforless.com/3M+Fini...utm_medium=cse