: The epoxy doesn't have to be tacky to get a chemical bond, the
: epoxy takes about a week to get about 75% of the total cure and
: about a month to get a full cure at room temperatures. Anytime
: in that first week will work fine and still have a chemical
: bond.

Hi Bill,
I use west system epoxy and they say
Apply second and subsequent coats of epoxy following the same procedures. Make sure the previous coat has cured firmly enough to support the weight of the next coat. To avoid sanding between coats, apply all of the coats in the same day. See Special preparation-Cured epoxy. After the final coat has cured overnight, wash and sand it to prepare for the final finish.