Rust on DD washer Cabinet
Is from the bleach dispenser, it either is clogged or bleach was added carelessly.
That KM D&M DW had to be the last gasp for a high end D&M with the KM name on it, Sears wisely got rid of the junky D&M built DWs when WP started building most of their DWs in 1984. Other than an interesting curiously the DW isn't worth moving or installing if you actually need a DW.
Warring if anyone is going to move, work on or install this DW be sure to ware protective Kevlar Gloves to protect your hands from all the sharp metal.
John L.