Yeah, I used QuickFair and would definitely do so again. Mixing is sooooo much easier.
But to my issue... I've had the same problem with both epoxy over straight epoxy and over stuff thickened with graphite. SOP for all applications is to vacuum and wipe with a micro-fiber cloth (picks up dust much better). I've tried wiping with alcohol and with acetone -- no joy. One section I also washed with the straight water. When it still happened following the procedures noted above, i'm still trying to think what would cause it. I wondered about a bit of grease from my hand, but given the alcohol and acetone experiments that seems pretty unlikely. Tipping after rolling it seems to get rid of some of it, but definitely not all. I've finally decided it's dust of some sort. Running my hand over the hull, I found few of some sort of larger sized black dust particles following a wipe down. I guess I'll just get crazy fanatical about wiping and alcohol and more wiping. One other thing: I turned off the ceiling mount heater and the ceiling mounted air filter before the wipe down. Presumably, with the room air still, dust won't be flying around.
What I can't figure out is that it appears that none of the rest of the builders are having this kind of problem....at least one that is not pretty clearly related to dust or technique. But it's becoming something of an obsession for me...probably a control issue.