I know that soy paint is safe for chewing, but white and pastel colours aren't available anywhere (please let me know if you find them anywhere).
The water-based plastikote enamel is said to be safe for waterproofing stuff, but how about for use on chew toys? I was thinking about getting
some bottles of matt white plastikote and adding natural food colouring to them.
Do you know any other alternatives to soy paint?