I wasn't referring to dealing with blush. I was referring to removing unwanted epoxy, squeeze out on scarfs being an example.
Are you serious? You sand off squeeze-out?
Instead of sanding off squeezed-out-excess and gumming up discs and throwing partially-cured epoxy all over the shop, this is what I do...I scrape it off and use the excess elsewhere. Grab a putty knife, scrape off the excess, blade it into a fillet for some other joint.
But I prefer to add wood flour to the scraped-off excess until it has the color and texture of peanut butter, spread it on Saltine Crackers and serve it to people dumb enough to sand off the excess squeeze-out.