my 2007 Ranger 4x4 rims are getting black spots! anybody know the best way to clean this stuff off? they are not oil spots or dirt. not sure what it is.

 

Looks like brake dust/water spots, a good wheel cleaner or cleaner/wax should remove them. Have you recently replaced the OEM brake pads with aftermarket????

 

john guard, the wheels have a clear coating sprayed on them when made to help preserve the shine of the new metal. This clear coat gets chipped or cracked and lets water, dirt and salt water get under it and it gets trapped in there. While it's there it works on the bare metal and makes it corrode or rust and it expands the area of corrosion as time goes on. Spots of corrosion look grayish white and may have black spots as well. In your picture there is a wheel weight, which gets installed with a hammer and the clip on the weight digs into the clear coat and the metal to open an entry point for water and other contaminants to start working on the metal part of the wheel. The other spots on your wheels are probably from rock chips made in the clear coat. Trying to keep the wheels as clean as possible can be a real chore and even then not all the cleaning that is done will remove what is under the clear coat. I've thought about stripping the clear coat from the wheels so nothing can trap fluids under it. Then I would have to deal with giving the wheels a polish job every so often to keep them shiney and bright. But that may be a better route than having contaminants trapped under the clear coat and watching it take away the looks of the wheels.

 

Get some comet powder cleanser and apply it to your wheels and scrub with a wet rag. Rinse and repeat until the spots are gone.

 

ok, i have not replaced the brake pads since i bought it. i am going to get a brake job tommorrow.
i tried to clean rim with comet and it works but......it's a lot of work.
will the rim be hurt if i uses LOTS of comet???

 

Using alot wont hurt your wheels, stick with the rag and avoid using steel wool, or abrasive pads.

 

I just used one of those power ball type cone shaped pads that can be put in a drill. Did a great job with much less work