well, I finally got around to mounting tires on my blazer alloy wheels. This is what the wheels looked like before cleaning them- this was one of the better looking wheels... the other ones had grease, brake dust, corrosion all over them and were almost black...
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I started cleaning them with simple green, which did nothing... Then I tried Eagle brand etching acid on 2 of them, and they were getting better, but I needed a stiff wire brush to loosen the crap off the wheels, and another application of etching acid, they looked better but still dirty.
So after that I grabbed a box of SOS steel wool with soap, and scrubbed them, then washed them with water, and used etching acid 2 more times with a plastic brush, and this is the outcome:
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and on the truck with no center caps:
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and with my rally center caps:
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I really like it now. I was on the fence till I put the center caps on. I had to open the holes in the center caps up because I am using the externally threaded lugs from my factory wheels- the threads actually sit inside the holes for the lugs, so I can't get the factory plastic caps on. I will probably buy chrome lugs at some point, and I want to get 2 more rear 4x4 caps so the holes from the locking hubs are gone on the front.