Livin Lite VRV aluminum oxidation

I've had mine for 18 months and about 30K miles on it. None of these problems at all. No corrosion any where, underneath, roof, sides, anywhere. Always outside here in SE PA. My trailer is not painted, as it has a coating applied to the aluminum with color prior to assembly. For the life of me I can't remember what they call it but most aluminum trailers have it. I was unaware that Livin Light painted some of their trailers. I used to have a motorhome that had painted aluminum sides. I did have a few small problem's with electrolysis. The "secrete is to treat those area's as soon as you see them develop by sanding, primer, and paint. Once I did that ( biggest area the size of a dime), I never had a problem.