drayer

A tanning-trade technical term: to scrape the remaining flesh from a hide with a special two-edged tool, la drayoire, to even out its thickness before further processing — pure leatherworking vocabulary.

• L'artisan draye la peau pour éliminer les résidus de chair. — The craftsman scrapes the hide to remove leftover flesh.
• Cette peau doit être drayée avant la suite du tannage. — This hide needs to be drayed before the rest of the tanning process.
• Le drayage assure une épaisseur régulière du cuir. — Draying ensures an even thickness of the leather.

A pure trade term with no figurative or everyday use — there's no realistic learner mistake to flag beyond the fact that almost no native speaker outside tanning uses this word either.