One of our customers has some armaflex on external runs (about 45m total), which is starting to crack from UV/sunlight. The first thought from our engineer was to paint it with two coats of Armaflex paint to preserve it/protect it from getting worse.

Has anyone done this and recommend it as a good way to go?

Presumably, it would stop further UV/sunlight damage but I was wondering how long it would last before another application would be needed.

The better alternative might be just to do it properly with HT-Armaflex, which is better against the elements, yes?