Circa '55 Admiral K2216 21" B&W TV/radio/phono combo

[AUdubon5425]

I'd get a cheap can of Goop/Gojo/store brand hand cleaner w/o pumice (like Reece said - the white stuff works too.) Get a rag and a bucket with some water with a little bit of dishsoap in it. Wipe off the area real good with that to get the loose dirt off, then try rubbing the Gojo on with some #0000 steel wool, wiping clean again with the rag. Don't have to use much pressure, but that should cut through most of the crap on the cabinet.