I repaired a crack in our bathroom tub with laying a piece of fiberglass down. It is taking for ever to cure. Is there a way to improve or speed up the curing?

If it has not cured by now it isn't going to. Did you use fresh resin and catalyst?

Yes it was fresh resin, purchased from a store. It has finally become non tacky thanks I was wondering if heat or air would improve the time I guess it was just time.

At this point you have little to loose so try a hair dryer for about 5 minutes, do not use a heat gun for paint removal.