In a current, near-future 'metahuman' game (there are no costumes and they aren't 'superheroes' even if I'm using rules from a SH RPG), I have a nano-tech enhanced character and an alchemist.
They've cooperated to make alchemical nanotechnology, and the resulting creations they've doled out to the other two characters in the group have gotten a little out of hand. ^_^ As well as the alterations to their character sheets as they purchase new stuff.