What to use for Fairing and Filling Holes?

[brianct12]

Mulv,
I spent all last summer/fall filling holes, cracks, etc. I have used the following:
Marine-Tex
3M Marine Filler
Formula 27
Micro-filled epoxy
Bondo
For filling those little screw-holes ... you would be fine to use inexpensive bondo. It is not exposed to water continuously and you will be painting over it. I would recommend the 3M filler for crack fairing below the waterline, and the Marine-Tex anywhere you want the highest structural strength. The Formula 27 is like a bondo but supposedly good for below waterline. However, I found it difficult to work with - it would set up in like 60 seconds. I wouldnt bother with filled epoxy - just too much hassle and mess ... and not needed for what you are filling.