Bad Idea. Start over from scratch. Chalk it up as a valuable learning experience. Better than going OH S***!!! in a few years on a collapsed landing gear and finding out the part failed because you were trying to save a bad part and a few bucks! Remember, experience comes at a price.
If you wait more than a day the heatgun will not work for you as the resin sets up.
Besides, that is one of the tiniest parts you will ever layup. If you're thinking of trying to save it, you are thinking way too cheaply! I used more fiberglass and foam and resin to make the bookend that was a practice layup in the Long-Ez plans! I have spent hundreds (if not thousands) on pieces I never felt good about using and never did. (I was doing other stuff, I even built a fiberglass canoe mold I never even used.) Cost of doing business, and education.