This was from a guy who has had a gun shop for over 30 years.
I still stay away from 5.56, but have brought 7.62x39, and .45 ACP Wolf from his son many times, without issue in my SKS, AK, and Glock 30.
Unfortunately his son was busy at the fishing counter today, and his father, who actually retired from the business a few years ago, but just hangs out at the store with a group of his retired friends all sitting around in lawn chairs, wouldn't sell it to me. Eventhough I told him I've ordered cases from his son many times. He's not doing his son any favors.
I heard the whole lacquer story, which despite me telling them they've revised their manufacturing, they ignored.
The owner even told me "That gun manufacturer from Maine, who makes the 7.62x39 guns, advises people not to use Wolf as it will void the warrranty".