Wanderer said:One crack and you better have some good putty, or a blowtorch....
Mattkcc said:You don't repair a crack in fiberglass with putty and certainly not a blow torch. One thing to watch with older fiberglass is it can get brittle. Repairing fiberglass is pretty straight forward but does take some skill. You would need to terminate the crack by drilling through the ends of the crack. Grind down flaring out then epoxy strips of cloth each larger overlapping the one before. Fill and sand repair will last longer then the van.
Wanderer said:Shows how much I know of them but then again, I'd never own one. With sheet metal You only have to worry about the metal edges/spots rusting out and there's a whole slew of proactive methods to stop that.