I notice premature fatigue on my 10' a-frame and a 24' extension ladder that have permanent residence on the roof of my van. I think it must be UV plus a little wet and temp difference. I was thinking about getting a good oil-based paint to paint them up to protect them. Do you guys notice this and what do you do?

I just find it ironic that my ladder rack-bound big ladders are the most expensive, least used, and wear out first.