And here are the "after" photos:

Crescent Tool Co. (Jamestown NY) "MoToR KiT" 5-inch slip-joint pliers
These were pretty clean. I spent about 10 minutes on them with a brass brush and WD-40.

"Forged Steel USA" is the only mark on this pair of 6-inch Slip-Joints. I thought perhaps they might be Harrolds.
About 15 minutes with a brass brush and WD40.

Ideal Industries 45-079 BX cable cutting pliers (patent 2246350)
Maybe all of 5 minutes with a "Scotchbrite" pad and "Bar Keepers Friend"

Wald Mfg. Co. (Maysville KY) 5-inch bicycle wrench
Another 5-minute quickie - "Scotchbrite" and "Bar Keepers Friend"

Lectrolite Corp. (Defiance OH) 218 8-inch Slip-Joint Pliers
This was the roughest piece of the lot. I spent maybe 10 minutes on it with a brass brush and WD40 and then another couple minutes with the "Scotchbrite" and "Bar Keepers Friend" and gave up. This is as good as I'm going to get them shy of putting them on a wire wheel, which I'd prefer not to do with these.


"Sav O Nut" cast aluminum alloy Propane Tank & Grill wrench (patent 5303619)
About 10 minutes with the "Scotchbrite" and "Bar Keepers Friend".
Cleaned it up and gave me
exactly the finish I was looking for without removing the red paint from the "ON/OFF" impressions.
As for Don's little DOE, it's shinier than I was aiming for, but I think a bit of handling will tone that glare down a bit. ("Scotchbrite" and "Bar Keepers Friend" again.)