I was thinking an item you place on a wires to cover them up and could be painted to be hidden, maybe in game mechanism would work like a paint bucket.
Why would you want to hide wires?
They’re not exactly the prettiest things, especially if they don’t fit to the building’s theme/colors at all.
Maybe allow copper wires to be painted?
Or the ability to craft colored wires?
Could you not use and paint metal blocks?