Can gouache paint be used on handmade pottery cups?

Gouache pigment has poor preservation, it will be washed off when it meets water, and it will crack and fall off when it is coated thick.

But if you paint just for fun, paint.

Relatively speaking, propylene pigment will be better.

But if it's a burnt pottery cup, shouldn't it be specially glazed so that it can be used? Otherwise, painting with ordinary painting pigments can only be used as decoration.