I had to buy a new visor header for the roof cap to attach to the windshield. Roof top is painted but i have all the holes from riveting the visor back in. How do I fill the holes in the fiberglass top? Seam Sealer? Marine Rx? Trying to fill just the hole and NOT sand the whole roof top and repaint. Suggestions on what product to use for this, techniques, etc? Thank you!