This details the rather sad story of Rustbelt, a none-too-bright but compassionate Joker whose powers reside in an iron skin ('armour') and the ability to rust anything of iron or steel at a touch.
The backstory is comprehensive and details a massive adventure based around a vist to Africa in an attempt to rescue an orphan he'd been supporting there. It would actually make a good adventure in its own right if you prefer that to having it in the character's history.
The delight here is how ordinary Rustbelt is, how human despite the grotesque appearance of a lumbering metal creature who is somewhat lacking in the intelligence department. It's clear that he just wants to be the best person that he can be, and will use his powers just as he'd use any other ability to do good whenever he can. OK, so he's a bit niaf and trusting. So what, he's nice, he's one of the good guys.... and someone you'd like around in a pinch, provided you are a good guy too.
Complete with full character sheet, illustrations and datafile. A nice addition to the 'crew' of characters.