I still prefer to use a sink full of hot soapy water,
and a medium stiff
paint brush, and lots of elbow grease. The brush gets down into the cracks
and crevasses, and any texturing on the case. I also prefer this method
because I enjoy the act of scrubbing everything up. I like to see the
cleaned piece emerge from years grime and dirt, and the work gives me time
to think. A toothbrush and a facial buff pad are also useful.
Lestoil liquid cleaner diluted with a little hot water will remove the most
astonishing amount of sheer crud of anything I've ever tried that's not
either an abrasive or a solvent. Use it with a brush; let it sit awhile.
..Seth Lewin