I cannot use vodka or any other form of alcohol in my cakes. Hence, painting a cake has become challenging for me. I tries water but the result was horrible. I considered using oil but was not sure if it would stay. I also need a liquid option to mix with luster dust so that i can paint my tiaras. Air brushing paint is expensive so that is not an option either.. Please suggest something that would work perfectly and can achieve a good solid colour.