That's a new one for me. Why?
It was a suggestion on Hometalk but I couldn't find the project.
Ditto, in re the "why" part...see my response to Naomie Moore, above, for more on that.
Also, what part? The husk, milk, flesh, or....? And what sort of paint? And where did this come up? Is it some variation of milk paint?
WHY? For what purpose?