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Old 09-24-2013, 07:49 AM   #1
2 Rivet Member
1966 26' Overlander
1995 36' Cutter Bus LE
Largo, Florida , Florida
Join Date: May 2006
Posts: 40
Bleeding from small plastic coated Tarp on Polished surface

While installing a rockguard on the front window in the blazing sun I put up a canvas plastic shade which worked until the rains came. I left it overnite in the down position covering the front window. The next morning I uncovered noticing the shadows resulting just over the Airstream Nameplate and some of the surrounding areas.
Anyone had any experience regarding this shadowing result. It does not have a caked effect but has discolored the polished surface. Any ideas???

brodjeaw is offline   Reply With Quote
Old 09-24-2013, 07:53 AM   #2
Rivet Master
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,288
The wet canvas held water against the skin and accelerated corrosion/oxidation. Just touching bare aluminum with your hands can darken it.

If you keep a coat of wax/sealer on the polished stuff, it will help reduce oxidation.


perryg114 is offline   Reply With Quote
Old 09-24-2013, 09:07 AM   #3
Rivet Master
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,925
The plastic coating on the canvas might have been flexible PVC. It loses plasticizer and its acidic nature might oxidize the surface of the aluminum. It will require a little repolish to remove it.
dwightdi is offline   Reply With Quote

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