Why is there an oily film on my epoxy?

Amine blush can be described as a sticky, oily, or waxy appearance on the surface layer of a cured epoxy. It can appear as greasy white spotting, or even salt-like, crystalline deposits. Many times, it can also be cloudy, milky, or gray-colored, with opacity and dullness. The cause is most likely due to a side chemical reaction of moisture (humidity) in the air, interacting with the curing agent in the epoxy. Amine blush is water-soluble, so it's very simple to clean away. All you need to do is reach for a plant spray container, some warm soapy water, and a Scotch Brite pad. Spray the affected surface with the water, wash thoroughly using the pad, wipe dry with paper towels and you're done.