: My question is, if it doesn't blush, does that mean I don't have to sand in
: between coats? I'm sanding now to be safe but, do I REALY have to even if
: it's cured for a few days?

Those are questions best answered by your supplier... but I've never let that stop me before Epoxy (at room temperature) doesn't achieve a full cure for a few days after it is hard. See http://www.westsystem.com/frames/tier2/usingepoxy/usermanual.htm for a complete description. So you don't need to sand as long as you're in the Gel Cure or Solid Final Cure stages. The West System site (above) explains this very clearly.

: The other question is for epoxy in general. If it's mixed right and is too
: cold to cure (50 degrees or so) will it eventualy cure or is it possible
: to keep it cold enough long enough that it will stay rubbery even after
: the temperature warms up? I'd hate to have to scrape off rubbery
: fiberglass because of a week long cold spell in the garage.

I asked Larry at Raka that same question. He indicated that as long as it was mixed properly, it would eventually cure... regardless of temperature. My experience on boat #1 corroborates that. As cure time increases, so does the chance sticks, bugs, cats, spouses will get stuck in it.

Good Luck David. Let us know how it turns out.

- Chip