Ceramic Sugar Bowls I Found A Low Ceramic Bowl/pot That I Want To Use As A Novel Sugar Bowl. The Inside Was Really Rough So I?

I found a low ceramic bowl/pot that I want to use as a novel sugar bowl. The inside was really rough so I? - ceramic sugar bowls

coated with clear nail polish to make it more usable. Now I wonder if the chemistry of sugar glaze to give and if I hurt you? Thanks for the help.