boësser

An extremely rare goldsmithing/metalworking term: to smooth away burrs from chased or engraved metalwork using a specialized tool called a boësse. A learner is very unlikely to ever need this outside a specialist craft context.

• L'orfèvre boësse la pièce ciselée pour en lisser les bords. — The goldsmith smooths the chased piece to even out its edges.
• Il faut boësser soigneusement avant la finition. — You need to carefully burr-smooth it before the final finish.
• Cette technique consiste à boësser le métal après la gravure. — This technique involves smoothing the metal after engraving.

This is a rare, archaic-leaning craft term almost no native speaker outside goldsmithing will recognize — don't expect it in general conversation or writing, even literary.