Right now I am using evercoat reinforced filler. It has short strand fiberglass in it. I plan to use Rage over the top of this after I get where I feel I have a good base of this stuff to help reinforce the seam I created.
Finished third round of fiberglass reinforced filler on drivers side and first round of rage ultra. Did I say how much I hate body work.
At least the rage is easier to sand.