I'd like to try to help, but from reading your post I'm confused.
See, gelcoat is usually sprayed into the mold when our eggs are built (so it ends up on the outside). It's a two-part polyester product (sometimes available as a one-part "scratch patch" type of thing).
But... one doesn't generally "brush" it on later. You CAN use gelcoat to fix up scratches, divots, and isolated problems, but if you are going to "repaint" the whole trailer, then you should probably paint
. Brush or spray.
Now people do sometimes re-spray gelcoat, although I would argue that a good two-part paint
makes more sense when it comes time for that.
Also... there is not usually any clear coat on an egg. I wonder if some well-meaning former owner sprayed yours with automotive clear coat (usually put on top of paint
, not gelcoat, but you never know).
Can you explain in more detail? Photos?