Weird contaminate (or something?) on aluminum wheel

Don_Lightfoot

New member
These wheels are original American Racing Torque Thrust T70's from the late 1960's.



I do not have enough posts to put in a picture link so Holden will be doing that for me, hopefully just after this post.



This problem was not there two weeks ago. Some kind of effect has shown up on two of these wheels, and it is not brake dust. The two wheels involved are both on the same side - one disc, one drum. Also, there is no "uniformity" to it around the entire wheel, as only a small section of each wheel (say 1/5th) is effected. It would almost lead you to believe that some kind of contaminate settled on the lower section of the wheels while in a dormant position, perhaps during a recent trip on the open trailer. The area in question is polished aluminum, not clearcoated.



Here is what I have done thus far::

1) – Several applications with Mothers Aluminum Polish.

2) – Several applications with Simichrome Polish.

3) – Buffing wheel on electric drill using Eastwood Rouge Compound and Loose Wheel (did not want to start this process with too harsh a compound or wheel).

4) – Tried a little tougher wheel using both of the polishes mentioned in the first two steps.



So far there has been no improvement. I hesitate going to the harsh Eastwood compound and wheel. I’ve used those harsh items in the past on various old car trim with excellent results, but am a little leary doing that with these rare and expensive wheels.



It would be nice to know what those Black pigments are, but more importantly what would clean them without harming the wheel.



I did a lengthy search on this site and notice reference to two possibilities, those being a product called P21s and Mothers Billet Aluminum Polish. Perhaps one of these is the answer.



It is obvious there are a lot of knowledgeable people on here and I would certainly be grateful for a solution. Thanks in advance.
 
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Aluminum wheels w/o paint are sensitive to acid etching and so many wheel cleaners will damage those wheels. The first and least aggressive step is to use a pH balanced wheel cleaner such as P21S or Sonax Wheel Cleaner. Both cleaners are locally available as well, P21S is labeled S100 at your local Harley Davidson dealer and Sonax is re-labeled as a BMW care product at your local BMW dealership.



The next step beyond that is an aluminum polish. I can't say that I have polished many aluminum wheels but there is a product called S100 Polishing Soap, again at your local Harley Davidson dealer. It may solve your issue.
 
Thanks for the input guys. I may try some of that P21s. It appears both gel and liquid are available. I would assume the Gel would be better for my purpose, agree?
 
I believe there is only one P21S Wheel Gel Cleaner. The Sonax is slightly less expensive than the P21S but it's up to you.
 
I have been really impressed with the P21S Polishing Soap. Being "water based" (for lack of a better term) it's very user friendly as you just rinse it off as you go. It's not aggressive but it just might have enough bite to do what you need.



It's also very versatile, I use it to polish up my bath & shower fixtures (from the mid 1960's) but where it really surprised me was when I used it on the sink in my bathroom. That was a much newer fixture (about 4 years old) but it really made it shine!



I sent some to my dad and he did the same thing, LOL.
 
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