[EricU]

I had high hopes for the Upol 7061 Flexible High-Density Body Filler (Flexible Bumper Filler) and used it on one of the cracks that I had V’d out.

The Upol does sand easy, the problem was that it was too thick and therefore not flexible enough. The dried vinyl adjacent to the flexible bumper filler just cracked away. So I ground it out and used the TotalBoat’s FlexEpox, which did work quite well.

But don't throw away that tin of bumper filler as there is a use for it...