: Anytime you let fresh epoxy set there is amin blush working it's way to the
: surface. It may not appear on top for 18,24,36,48 hrs., but it's coming.
: If you try to laminate or coat over it you will get a bad bond.

I agree that wet on wet is best, but what about amine blush free epoxies?

Also remember that amine blush can work its way through more than 1 coat of epoxy. If you put on a second coat before the blush from the first coat has come to the surface there is a good chance it will come up from the first coat through the second coat to the surface.

Just for the record, I still think it's best to just recoat while still tacky or wait and sand. It just isn't worth it to hurry after waiting too long.