"Sure." Because he's still not quite sure what Bucky's looking for, but he's not opposed. "I'll just be a minute myself, then we can get going."

He has to make himself presentable, obviously. So when Bucky is done doing-- whatever he finds necessary, Arthur's properly dressed again, sleeves crisp under the suit jacket he's tugged on over his vest, and to complete the picture of a Modern (Sixties) Gentleman he's even got a damn fedora trilby on when Bucky finds him outside pulling open the garage door.