my underdrive pullys look like crap!?

[Maarty]

installed a set of steeda underdrive pullys a couple weeks ago and i love them! the only bad part is that they started to oxidize? turned a grayish old looking color that doesnt look good. what happened?

 

[Maxpowers]

Does it wipe off or does it need sanded?

Where did you buy these?

 

[streethorse]

Theres got to be a reason for that, some kind of chemical got on there Im
thinking..... I would try cleaning it with some wd-40 or something.

 

[Maarty]

I got them from american muscle. I sprayed them with wd-40 and it disappered untill i opened my hood again after I took it for a ride. Only the water pump and the alternator pulleys are like this the crankshaft pulley appears to be fine