[Neus]

Dynamic resources like icons contribute to savefile bloat, so I don't think that is likely to be a thing any time soon. It's possible that you might be able to change the appearance to another weapon of the same type that exists in the game already. Custom descriptions are also possible but something I'm a little ehh on. That's also data that has to be saved and loaded frequently, which doesn't mean it's a no go, but it is something to consider when you're talking about big inventories full of weapons with no real way to predict how extensively it'd be used on a per character basis.

Personally, I agree that the player profiles are a better use for this sort of thing. You have so much space in there that would be perfect for giving your weapon a little history or description if you really want to.