When ever drilling or hole-cutting into fiberglass, always use masking tape generously applied over and around the area being cut into. Run drill bits in revers

When ever drilling or hole-cutting into fiberglass, always use masking tape generously applied over and around the area being cut into. Run drill bits in reverse to get past any gelcoat or paint coatings, then run the drill forward to affect the cut. The same goes for hole saws. Slow speed is best with the proper blade for jigsaws. This will prevent cracking of coatings (especially gelcoats) and splintering of the fiberglass.