I have been working on my fiberglass fenders and hood to make them fit and look nice when painted. The hood is not very straight on the top. It is made by AAR, a bolt on hood. There are low spots found when I lightly sanded the jell coat. What can i use to fill these low spots? Car bondo or fiderglass ? I can see it will need more sanding. In one spot I will have to go through the jell coat, just to get it level next to the low spot. Any help from you bodyman. Thanks.