[Sonny]

dakota,

I'm going to have to note that the floor/footbox was probably sprayed/chopped layup item and when they chopped in the first layer of resin/glass fiber there could have been acetone in the first spray or a bad resin mixture that would resist curing in between the gelcoat, VERY BAD, or it could have been a minus in the catalyst amount in the first spray to a very cured gelcote of a few hours, ever which, theres no cure except grinding it off and painting on matching color gelcote with a 50% catalyst for conditions and laying over the smooth side of commercial wax paper and the taking a broad putty knife and smoothing out the foil/or wax paper to smooth and letting cure. Do not force cure since the catalyst will be at 50% or less, might take several hours. Sand off any rough edges after peeling the wax paper off and polishing with series of course to fine compound. Kinda messy but the most sure fire way of patching a spider/heat crack area. If the glass was good to start with it would not, WOULD NOT, have happened.