Google Imron, look for a filler/primer. Temporary at best. There is no fix. Remove the crazing, start over.
I think the root cause of crazing is too much hardener in the original mix. Paint film should have some ability to expand and contract with heat, same with gel coat. Yours is just too brittle.
http://pc.dupont.com/Search.do?q=primer+filler+nonsanding These chemicals are all "systems" and not all individual components are compatible. Do A LOT more research or be prepared to do a lot of flu$hing. They get expensive in a hurry.