Originally Posted by tech69
High build is generally for waves you can't see or feel. If you ask it to hide something you can see in a pic it's asking far too much of it. You can always make a dam with some mat and 2" tape to extend that edge out and grind/sand it to where you want it then do the finesse work in filler.
I don't think it is serious enough to require hard to sand and smooth out fiberglass. The problem with trying to feather it is that it ruins the lines on the edges as you can see carefully in the pic that the edges though relatively good are not perfect (at least not in my eyes) Basically whenever I sand the filler it takes down some fiberglass as well. You can see in the pic that I have several lines and edges to deal with.
I need to find an object similar to the shape somehow, it'll smooth it better than the flat sanding block.