Originally Posted by ak_chloe
And just curious because I'm new to all this, what is the best tool to use to grind down old electric wires and other rough surfaces on the interior walls?
I think you'd better send some pictures. I cannot quite get my mind around the idea of needing to "grind down" wires.
Airstreams are built with two layers of skin, one on the outside of the ribs, the other on the interior. Wires should run between the two layers except where there are outlets, switches or light fixtures. If wires have been cut to remove a fixture or outlet, they'll be needed to install a new one in the old one's place. If you are planning to remove a light or outlet, you have to remove the wire from the converter or fuse panel as well as from the place in the wall where the outlet once was. Before you do that, you should make sure you know how the circuit runs because there are usually more than one light/outlet on a circuit. If you're eliminating a single outlet for instance, you should never use an open or "flying splice" (twisting the wires together and using tape or wire nuts to over them and bury this behind a wall. Instead, you leave the wires in the box, and put a blank face on the box (no holes for plugs or a switch). That way, if you or anyone else wants to put the outlet/fixture back in they just reopen the box and rewire it.
Leaving a live wire between the walls is horribly dangerous - electrifying the shell or starting a fire would be the big hazards. If a wire is disconnected at both ends it might be possible to actually pull it out of the wall, however it might be anchored at some point to a rib. If you're absolutely sure you've got a dead wire, you could simply roll it back into the space between the walls and patch over the hole in the interior skin.
If there are holes in the interior shell there are several ways to patch them. Again please send pictures.