5F5 fiberglass stripper. I used to strip Corvettes with it Beetle, stuff works awesome but is brutally toxic. Use rubber gloves and after letting it sit a few minutes, strip off with a rubber squeegee. Don't want to get any on your skin, naturally. You will be outside when using so ventilation should not be an issue. Check with FishingFreak as it seems he is in the autobody field and will know alot better than I. 5F5 works easily though and does not affect the gel coat.
