Huh. Sounds like, at the very least, there's no point in wiping down with denatured alcohol. Well, it removes all dust, and evaporates quickly. But, water may potentially be more useful.

: Your previous coats of epoxy under the new coat continue to cure
: and release
: blush which rises through the new coats.

: I find areas where epoxy will bead up on my third fill coat unless
: I scrub the
: second coat surface down with water and a 3M scrub pad.

: This is after epoxy glass wet-out, and two fill coats that
: have been re-coated shortly after reaching green a tack free state.

: Water is a solvent, and blush is water soluble.

: Adding anything other than water increases your likelihood of
: surface contamination.

: You can rely on luck, or get in the habit of a quick water scrub of
: any epoxy surface before
: sanding or re-coating.

: Rob

: Even when I do everything right, there are still plenty of problems
: to fix.