It would be a cool if Vinnie makes oversized guitar picks to autograph at his events.
You could fit some cool graphics on it (ankhs, his face with/without makeup, guitars...)and he could sign them.
Maybe one day.

He would at least know the ins and outs of having pics made, of which I know nothing. Not sure if a real pick company could do it, or just some novelty company.

Lots of things can be merchandise for Vinnie. It's only the beginning.