I tried putting some of this on cheap bar clamps from Harbor Freight. I didn't have to scrape any glue off, it all just came off.
I used TB II. Maybe thats why. I tried using the stuff as waterproof on my boots. I work with animals and the urine destroyed the stuff pretty quick. From what I can tell talking to people, the stuff is great initially but wears out pretty quick. On the clamps I also let the glue dry and it pretty much peeled off without scraping.Interesting! I put Never Wet on a denim apron. TB-III sticks to the apron just fine.
I'll try on the clamps.