Just got off the phone with Coker and here's what they said... The coating is water soluble, they said the best thing they've had success with is to get a big tube and fill it with how water, let it soak about 15mins, and then it for the most part should just wipe right off. If there are stubborn areas, use Simple Green concentrated, not in the spray bottle, but the gallon.
So I guess I'll give this a try and let you all know...
Jason