We just painted our 1978 Boler
ensolite. A tip is to fill all the "cuts" or "tears" with
just plain old white paintable caulking. We then put a coat of primer on the ensolite which really cleans it up and improves "cabin odor". Then we painted with latex satin finish light
grey. Have to say that the ensolite "bubbles" may require a 2nd coat to catch all. We used a brush to cut in, a small size foam roller, and a small size roller that was "rough like rumpled cloth" that seemed to spread the paint better. Good quality paint spreads on the ensolite better so don't go cheap!!