how do i get this out on the backside of a wheel?

P

ptownTSI

New member
wheelinside.jpg




the wheels are a painted cast aluminum, I'm thinking the dark black parts are where it has been corroded through the paint/primer to the wheel. How can I clean this? I have scrubbed and scrubbed this stuff is stubborn. Any chemicals that would be helpful? Do I just need to break out a steel bristle brush?



I am cleaning up the wheel for refinishing.



thanks.



************************************************edit 1/30/12



This is an update from CarPro



Hi Mr. ptown







it should be ok, no problem on Aluminum , just spray it there , wiat 5 min and rinse off.







if you need more help let me know







rgrds



XXX



I had no idea they were from Cyprus? weird.



CarPro Trading Ltd.

Cyprus

tel: +972 546 411911

www.Cquartz.com

Welcome to CarPro - innovative car care
 
it comes off if i scrape it with the flat edge of a razor blade. I don't want to have the wheel media blasted, I'm just refinishing 1 wheel that seems expensive and a hassle.
 
it says to keep iron x away from zinc and aluminum. since that corrosion is on the aluminum, Iron x is probably not good then right?
 
I had the same problem when working on a grand Cherokee wheel. I used 0000 steel wool which helped. I also used some never dull. It was not completely removed but it turned out much better. Customer was happy.
 
ptownTSI said:
it says to keep iron x away from zinc and aluminum. since that corrosion is on the aluminum, Iron x is probably not good then right?
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That really depends; are you SURE the crud ate through the paint on the wheel?



I've cleaned plenty of wheels that look similar to that using IronX and never had a problem, but usually the paint was still intact under the layer of crud.
 
ptownTSI said:
well what is the risk of iron x getting to the untreated aluminum, this is the inside of the wheel afterall.
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My guess is clouding/hazing... but you'd probably want to ask CarPro for clarification. They have also changed/tweaked the product formula several times so it may very well even be safe now on any of those materials.
 
let us know what they say!



My GM wheels are only half-painted, so twoard the inner part of the barrel you're down to bare aluminum.
 
Here's my 2₵ based on how I cleaned up the backs of the Borbet wheels my wife runs in the winter (finally decided to do the back sides right)-



First use some aggressive wheel cleaner and some aggressive clay (the former will eat up the latter pretty fast). Yeah, the aggressive wheel cleaner might cloud up any exposed bare aluminum, so take that into consideration before you do it. The idea is to get off any [crap] that's between you and the aluminum and/or whatever finish might be left.



Once I got it as clean as possible, I used abrasion; you gotta get through the nasty stuff, down into the bare aluminum or the paint, and that usually does mean "to the bare aluminum" because any paint/etc. is compromised.





The steel wool oughta work but that's kinda aggressive. Not as abrasive as sandpaper though, so use what you gotta use to do the job; hey, you're refinishing anyhow, right?



I used a bristle brush on a Dremel the last time I did this, and between that and an aggressive polish things came out OK without tearing up the wheels too badly.



On the Dremel, I use something I think they call a "fiber brush", but the brass ones would be worth considering if you don't mind chewing stuff up a bit more and then there are all the various sandpaper-flap things and other abrasive accessories that you can use. Wear eye protection...
 
I can dig the dremel idea, that would work good. yeah just need to get it all clean for primer, the original wheels don't look like they were painted on the inside, is it just primer, or paint without a clear coat?
 
when I repaint, do you think the factory just primed the inside of the wheel and painted and clearcoated the outside?
 
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