Has anyone come up with a brilliant idea to prevent accidental epoxy runs into the trunk when applying fiberglass? I'm a long, LONG way from needing to know this (still working on side panels prior to constructing cradle) but wanted to ask while it is still on my mind--also it might be useful to others. I know that no matter how careful I am sometimes the epoxy runs over the edge and at that point there would be no way to get at it to clean it up (even if you knew about it). Epoxy runs inside there would screw things up forever.
My first thought is to carefully cut a one-inch thick block of foam to exactly fit the hole. A piece of clear packing tape on the top edge of the foam would keep the epoxy from sticking to it (which it may not anyway). But even if the epoxy did stick to the foam it wouldn't matter. When the rectangle of fiberglass is cut out, the foam would just come out with it. Also, I think the foam should be long enough to reach all the way down to the top of the trunk to keep it in place. The rectangle should not be cut out and removed until all epoxy coats are in place. (It might be a good idea to leave the foam in place to prevent paint from running down in there later. That could also gum up the works.)
Any better ideas?