WordNet sense 1 (having a coating; covered with an outer layer or film; often used in combination):

coated

WordNet sense 2 (fitted or covered with glass):

glassed

WordNet sense 3 ((of paper and fabric and leather) having a surface made smooth and glossy especially by pressing between rollers):

glossy

WordNet sense 4 ((of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it):

glassy, vitreous, vitrified

WordNet sense 5 (having a shiny surface or coating):

shiny

WordNet sense 6 (holding or containing nothing):

empty