Wiktionary
unburnished
a. Not burnished.
WordNet
unburnished
adj. of metals e.g.; not made shiny and smooth by friction
Usage examples of "unburnished".
The rings were of stainless steel, unburnished, the same dull finish as the gold-plated iron ring.
Neither the horse's metal breastplate nor the knight's unburnished plate armor reflected the sunlight.