Brian -
Cool pics! The dirt on the machine is pretty common, at least in my experience. Some can get really nasty. I have always periodically wiped down the tub rings of my mother's and my machines to prevent this, as they build-up dust, splash debris and the occasional over-zealous detergent scoop. I usually take the tub rings out in the back yard and hose them down top and bottom with a hose and pressure nozzle.
The machine looks to be in good shape though - the corner gussets look really good - little rust in there for a machine in a basement on the east coast.
Oh, by the way - which machine is leaking, the K or the M?
Gordon