Ah yeah, in the first picture right? Are they a moving part? If the hinges have been used then over time the paint would have worn away on them. I tend to stick a bit of wear around the joins between the various pieces of an item. With those I'd paint them up to be a worn grey due to the door chafing against them from the lack of maintenance (got to keep those oiled) and repeated wasterlanders opening the machine up to loot it.
Search either the Fallout 3 Nexus or Fallout: New Vegas Nexus for "Texture" or the like. I played both those games to death, so I'm a repertoire of modding knowledge. << No life. ^^'