Preventing black streaks on aluminum trim? - HCS Snowmobile Forums

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Old 01-17-2020, 04:04 PM   #1 (permalink)
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Default Preventing black streaks on aluminum trim?

I keep getting black streaks on the curved bright aluminum trim on the top of my trailer. I guess it comes from oxidation or dirt washing down from the roof. The only thing that it off was sos pads and scrubbing. When I got it off, I waxed the trim, but they still came back after a few months. Not sure if I should paint the alum or galvanized roof (whichever it is), after I clean the trim again. Maybe there is a sealer that can be put over the bright trim piece? My previous trailers didnít streak like this. A friend mentioned that they may have had anodized trim or a difference roof material. Thanks in advance.
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Old 01-17-2020, 04:21 PM   #2 (permalink)
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Clear coat it.
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Old 01-17-2020, 07:15 PM   #3 (permalink)
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my guess is it it is from matter breaking down that is ponding up on the roof like, and as rains come , it then makes it run down the sides
spraking a 50/50 solution of bleach might remove it
spray off when in direct sunlight on a small test area and seen what happens

I get it here on things(last trailer was all white)
and it worked perfectly for me
that or use power washer on it, that worked too!


I do my best to park trailer on a slope and lift tongue as high as possible to drain as much water off top
but leaves and such still stick to top and break down and well, they make that black crap, rotting material!
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Old 01-19-2020, 08:56 PM   #4 (permalink)
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you need to clean the roof of the trailer I have a 28 ft race trailer that is 20 yrs old that would do this all the time I now was the roof with a hot water pressure washer you will be amazed at how dirty the roof gets
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Old 01-20-2020, 07:38 AM   #5 (permalink)
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Billy Mays says OxiClean it!!!!
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Old 01-20-2020, 11:31 AM   #6 (permalink)
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Very common on RVs and boats. This stuff works well.

https://www.amazon.com/Kleen-M00505-...s%2C181&sr=8-7
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Old 02-16-2020, 08:48 AM   #7 (permalink)
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Quote:
Originally Posted by XCR1250 View Post
Clear coat it.
What type of clear coat would stick to bare aluminum and how would you prep it? I can't really spray it on, so would have to brush it on. I would be concerned about it pealing off later.
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Old 02-16-2020, 09:07 AM   #8 (permalink)
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Quote:
Originally Posted by ultrastryk View Post
What type of clear coat would stick to bare aluminum and how would you prep it? I can't really spray it on, so would have to brush it on. I would be concerned about it pealing off later.
Ask an Auto Body shop..they use clear coat on cars/trucks, never saw it peel off, even on my 20 year old Plow Truck.
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Old 02-16-2020, 12:51 PM   #9 (permalink)
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clear coat won't stop it
as its material breaking down and or molding as it does and turning it black
then rains or , cause it to pond on roof and at some point it streams down the side of trailer
white walls with clear over them and then black liquid running down over CLEAR coat, you will still see the streaks?

waxing trailer often will help water run off faster and leave less residue behind, but its not going to 100% stop it

parking trailer on a slope again so any water on roof comes off FASTER will help prevent things from breaking down on top, but again, its NEVER going to stop it all ! but will pretty much limit WHERE the streaks run down to just one area when on a steady slope to things!

you can always cover the trailer or park it under a car port to stop it if you want to, and its NOT a bad idea, as if you have room to do so(doesn't take much more room than trailer alone)
and will keep snow loads off roof too boot for you
car ports ain't a huge cost if you shop about for one. pending size you need that is?
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Old 02-16-2020, 07:54 PM   #10 (permalink)
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I'm shopping trailers now and seriously considering the "blackout" option for all the trim due to oxidation and a mild case of OCD... Either way, the first stop for the trailer is the detailer for Ceramic or Graphene coating. I have Ceramic on my Dually, and Graphene on my Denali and her XT-5. I'm not sure coating I like better but I can tell you both are 100 times better than waxing 3,4,5 times/year! I'm guessing a good coating wouldn't allow these streaks to stick.
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