I've got small hair cracks at fillet between the deck surface and
cabin side. It happened because there is a lot of putty with no
fiberglass layer on the top on it. It is painted with epoxy primer
(heavy coat) only. I like to add one or two layers of fiberglass using
epoxy. The deck, side cabin and the putty are polyester based.
My question is: should I sand the surface completely out of primer or I
can apply epoxy/fiberglass on the top of primer?
Thanks in advance
Adam