There's another kind of epoxy used to paint bathroom tile. I used it once when we were re-decorating a boat. It had old ceramic tile in the bath and I hated the pukey color. So I painted it using epoxy. I have no idea where I got the paint, but I think it might have been at a place where they worked on houseboats and motor yachts. It came in a small container, I know, because that bathroom was very small. I wouldn't have needed a gallon. It was also 2 part and had toxic fumes, so I opened all the boat windows and used fans to ventilate.
So, maybe a boat dealership or boat yard, some place like that?
