overglaze

noun

1. (countable, uncountable)The outer layer or coat of glaze on a piece of pottery
2. (countable, uncountable)A decoration, usually enamel, applied over a glaze.

verb

1. (transitive)To apply overglaze to.
2. (transitive)To glaze excessively.

   “If the dish is "overglazed," the glaze will "run" and bubble.”