Metal plating on the bolt? There was not much rust on the fender, but I sanded it down. I have been spraying it with denatured alcohol and wiping down with a clean rag.
I bought more Stanley hot glue, two other high-strength sticks with great reviews, and the best-rated PDR glue sticks on Amazon, but it requires a 100-watt hot glue gun, and the only good one I could find was this:
https://www.amazon.com/Surebonder-PR...t+hot+glue+gun
At thirty-one dollars, I was not ready to commit to it for a proof-of-concept. I do not remember finding any stores selling 100w glue guns. The ones that came with the kits were only 40w, so perhaps eighty or even sixty would have been enough for a button of glue, I just know that 40w gun was inadequate.
I used my heat ray to melt glue onto the tab. Both the metal and plastic tabs held! I was able to pull out dents! I will post pictures of the results soon. There are still high and low spots and a crease, but it is much better.
I have not gotten back to my cars, though. I wandered around a car paint superstore, but that seemed like a waste of time.