I tried baking them and then rubbing the skins off, per the directions in the bread recipe (Hamelman). Didn't work all that well. Looked online and found several recipes (including here) for boiling nuts in water and baking soda. I had a lot of nuts, so I used 8 cups water and 3/4 cup baking soda. Should have used a bigger pot. Foamed up and boiled over.
BUT, the skins slipped right off. Formed a mess of slippery shreds of skin that were the devil to clean off the nuts.
I tried soaking the mess in water; perhaps the skins would float to the top. NOPE.
I tried cleaning them off with my fingers. My hands were soon covered with clinging shreds of skin, which transferred back to the nuts.
I got a towel and tried wiping either the nuts or my hands on the towel. The towel was soon covered with clinging shreds of skin, which transferred back to the nuts.
I shook the dang towel onto the floor and went back to work, again and again. I was soon sitting in the middle of a mess of skins. It had taken me an hour to clean one cup of nuts.
I have given up for the night. Washed everything, swept and wiped the floor, and put the remaining nuts (still covered with shreds of wet skin) on a sheet pan. I'm hoping that they will dry out overnight and the skins will fall away rather than clinging damply.
This can't be the way that they process the nuts commercially. ADVICE - HELP - PLEASE.