I came across probably the same source as you did, on the No-Ox recommendation, about a year ago. I have an O27-type layout 4 x 24, with 2 concentric loops, powered by a KW. The switches are all 1122's. I run both PW and RailKing engines (no DCS.) Before I applied it, I meticulously cleaned as much old grease & residue off as possible, then laboriously "lightly" coated all the rails with No-OX, and then wiped them off later, as per the instructions. (The guy independently promoting the stuff gives an EXACT prescription for how to apply & remove excess.) I DO think it has helped. I still get sparking at some of the switch junctions as wheels go over them, but that was happening previously to No-Ox. I think I have noticed better slow-speed running as well.
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