> Amine blush is invisable and is just an oily surface that appears. It's
> usually not extreme and sometimes not even noticable. It's like a waxy
> surface on a window where you could drag you finger and see the mark. It
> is water soluable and some epoxies recommend using a little Amonia with
> water for clean up. It will interfere with the next coat of epoxy however.

With some varieties of epoxy the blush turns whitish.