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Request for help on how to stop aluminum from pitting

Our Aluminum trailer drop down horse windows are pitting - is there a method to stop the pitting? 3 out of 4 have pits in them already 2 just on the inside and one on the inside and outside of the windows. The manufacture only guaranteed them for 1 year we are now in our 4th year.

Letta Rothrock
- Londonderry, Ohio, USA
2003

Use a primer for aluminum ⇦ on eBay or Amazon [affil link] and then paint that with a polyurethane exterior paint.

James Watts
- Navarre, Florida
2003

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