stress cracks on front cap?

I had similar on the front of my motor home. It was at factory for some body work and paint. They fixed the stress cracks by building up fiberglass on the back side and repainted. I think yours would be same then refinish with gel coat to match existing. Might be able to build up from front. Just don't know. Recommend you watch how it is refinished because many places want to use paint the same color as gel coat. They can make it match but it probably will not age the same.