Frosted

1. Covered with hoarfrost or anything resembling hoarfrost; ornamented with frosting; also, frost-bitten; as, a frosted cake; frosted donuts.

2. Provided with a surface finish which is matte or with a very fine grain, reminiscent of the surface texture of frost; as, frosted glass. Opposed to polished or burnished.
[1913 Webster +PJC]

Frosted work is introduced as a foil or contrast to burnished work.

1. Rusticated, with formalized stalactites or icicles.
2. Given an even, granular surface to avoid shine; matted.
3. Closely reticulated or matted to avoid transparency.