Outcome
Eleven suppliers visited in all. The minor issues that came up were accepted and corrected on the spot. The exception was the biggest supplier, with the biggest invoice and the loudest claims of quality: theirs was the worst of the lot. Visible defects, scratched surfaces, hardware problems, items that needed rework — and a few bad enough that the client cancelled them outright.
I inspected the goods to the client’s instruction, recorded every issue with photos and video, and reported back. Not a polished “all good,” but the real condition of the goods, on record, before the balance was paid. Since then, the client has come back for the same check on their later orders.