i would suggest to also but at least 3 cans. you can use index cards around the rim to cover the tires. also get a spray adapter for the can to ensure even coats unless you have experience with dip or spray painting. spray about 4 or more coats on each rim and wait at least 10mins between coats. oh yeah and when the can gets low and starts to spit out the dip use another can or else you will get some bad texture in the rims. post pics if you do it.
2006 330i/ Monaco Blue/ ZSP/ ZPP/ I Drive/ Burl Walnut Trim/ Steptronic/ Xenon Adaptives/ Logic7/ CF Mirror Caps/ Matte Black Grills