burnish

burnish \BUR-nish\, verb, noun:

1. to make shiny by polishing
2. a polish or shine

A burnish on the copper pots made them very attractive.

The craftsman burnished and refurbished metalworks.

c.1325, from Old French burniss-, extended stem of burnir, metathesis of brunir "to make brown/bright, polish," from brun "brown, polished," from a Germanic source