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 RE: [RC] [RC] black streaks on trailers - Flora HillmanJuly -  
Do you live under an airport flight path?  If you do, those black 
streak are residue of jet exhaust, not oxidation.   
Hate to say 
-- you have to either keep your trailer under cover or wash it at least once 
every other month to keep up with getting the residue off. Otherwise the soot 
sets into the paint and nothing gets it out -- at least nothing I've found 
yet.  My steel trailer suffers the same problem -- I'm under the incoming 
western flights into Dulles Airport -- and the only solution I've 
found is to scrub it with a stiff brush using a super heavy duty 
cleaner.  I also repaint my trailer every year -- a PITA but at 
least it looks brand new when I'm finished.  I'm going to try a good coat 
of wax this year and see if it deters the soot from staining the 
paint. 
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