v. Simple past tense and past participle of enamel.
the GNU version of the Collaborative International Dictionary of English
adj. Coated or adorned with enamel; having a glossy or variegated surface; glazed.
Word Usage
"Along about 1834 an Englishman of the name of Magnus utilized the property that slate possesses of taking a fine polish in the invention of what are called enameled slates."