[jarendall]

The stuff I used to fill holes miss drilled and to fill in gaps in the fiberglass is called U-POL Fibral, if you need to fill the Gel-Coat then you will have to use something else, it is my understanding that you don't use anything that heats up on Gel-Coat, it may cause it to blister, I bought the Fibral at the auto paint distributor, you can not get it at an auto parts store, ask your distributor what to use on Gel-Coat