how in the H does this happen?

Brad B

Brad B

New member
Looking for an excellent set of Kinesis Supercup RS 3-Piece modular wheels. 8X18(2) and 9.5x18(2) to fit the Porsche Boxster.

Email me at bradb@autopia.cc
 
Brad,



I sold mine with the Speed Yellow 996. They are beautiful wheels, but very difficult to maintain. The rims do not have a clear coat, and it is very hard to polish around all of the studs.



db
 
Hmmm. David, is that a vote "against" them? How often did you have to polish in Sunny, dry Californy? Things take a bit more abuse here. I don't mind a little work but if it has to be truly "polished" often I will shy away from them.
 
Brad,



Sorry for the slow reply... was out to sea.



I love the wheel. The rims have a deep offset in the front for the Boxster. It makes it very hard to get into to polish. The rear is not as bad.



I live right by the ocean, so I have a harsh environment. To keep the high polish, I had to work on them 3 times a year. It would have been more if they got a lot of miles.



If polishing was easy it would not be so bad, but you go through 50 or more Q-tips getting around the bolts.



db
 
This is the second car ive worked on in this collection that has done this same thing. Its a 409 Impala SS and was repainted back in the 70s with lacquer paint. So typically when you cut/polish a lacquer car your pad turns the color of the vehicle. But in this case my pad turns black. The orange pad is my cutting pad and Im using a Hi-Temp product called super sonic. I washed the vehicle with dish soap to strip it, then clayed it with a medium cut bar, it had a lot of build up on it. Then re-washed it. I started cutting and sure enough the pad turned black. I had this same"issue" when I cut and polished the 59 tbird.

Its really not a huge problem because the car turns out just fine, Im just curious if anyone has seen this before. On a side note the last picture is my new business card and I am officially a business owner :cornut:

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I am not sure from the picture but it looks like it's metalic paint. If so, than I would say that the flakes have oxidized and you are picking that up in the pad.
 
Yep, you are essentially polishing the tiny little metal flakes that comprise the "metallic" in this old single stage metallic silver paint. And we all know that when you polish bare metal your polishing applicator turns black.
 
Michael Stoops said:
Yep, you are essentially polishing the tiny little metal flakes that comprise the "metallic" in this old single stage metallic silver paint. And we all know that when you polish bare metal your polishing applicator turns black.
Click to expand...

After i posted this that is what i thought might be happening, because I remembered when I first started polishing on semi-trucks, the metallic ones turned my pad black. I just didnt put 2 and 2 together. I thought there was still crap on the paint, even though it was smooth after I clayed it. But thanks guys! It is always greatly appreciated when I get feedback on here :notworthy:
 
This happens quite frequently for me. I polish a lot of old muscle cars, many of them having either original lacquer or repaints that were done in the 70's.

Almost always, the appearance of the paint residue left on the pad is MUCH darker than the color of the vehicle.

It could be that when the oxidized paint mixes with the compound, it chemically changes the color.(???)

Good question for TOGWT.
 
Bill, If it is a metal flake paint that is not clear coated than the black discoloration on the pads is because you are "burnishing" the flake along with the paint while polishing.

Hope this helps.
 
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