Another possibility: if you use too fine a grit paper and push hard, you can heat-up and soften the epoxy and then gum-up the paper. 80-grit is good for the initial epoxy fairing.

Ross

: I have glassed the outside of the hull and have begun sanding the now hard
: fibreglass. I have a lot of sanding to do to achieve a smooth surface and
: I find the sandpaper gums up very quickly. This is the first time I have
: ever used epoxy resin so I am not sure if this is normal. Its been a week
: since I applied the glass so I can't believe things are not fully cured.
: Is there a certain sandpaper I should be using or is this normal for epoxy
: resin?

: J Farris