I have an old stove-enamelled breadbin, in which the inner coating on the bottom has begun to deteriorate. I'd like to recoat the base so that it's a good sealed surface once again. Given it's enamelled, are there any particular paints (or lacquers etc) I should use to achieve this? I'd rather not have the whole thing re-enamelled. Someone suggested using radiator spray paint; is this a good choice? Thanks for any wisdom.