[COUPERS-TECH] Lower Cowl Fuel Stains

[Jim and Lynn Palmer]

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 Hi Ron,
  I had the same type of problem, I was sick.  My stains were from filling my tanks with not enough room left for expansion. After being in the hot sun it was like the blue stains were baked into the paint.  It was a mess and on the top of the wing where the whole world could see.
I tried polish and the normal tricks like you did.
It wouldn't budge. My plane is clearcoated also.  After a few weeks it just disappeared?  You can't see a trace of the blue now.  I don't understand it. It's magic.
I hope it happens to yours.
Jim Palmer M-10  N9513V

 

I'm frustrated.  My 'coupe got its' lower cowl repainted this Spring so I could get rid of the blue fuel stains from the "steel needle leak" from the Stromberg carb (-least, that's what I was told was the deal).  Then I put clear polyurethane over the new paint on the inside to help me clean the stains if they did happen.  Well, I had always remembered to shut off the cowl tank valve, but I had it in the radio shop for some work.  They ran it, and of course, forgot to turn off the fuel valve, and now I'm back to blue stains both inside and outside in (on?) the paint.  Won't clean up - tried everything I can think of (using fuel, cleaners, Brakekleen, mineral spirits, alcohol, soap, hand cleaner, cleaner polish, Simple Green, dishwasher soap, oil...) and even called Phillips Petroleum.  They didn't know.  Anybody got any ideas?

 

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