Any car that scrubs the bearing surface of the tracks is worth getting. The point, though, is that there ought to be more than mere abrasion. There needs to be a medium to entice the offending material up off that surface and to be removed.
I have abandoned alcohol because it's the wrong solution, according to that published list of suitable fluids, and my clean drop cloth remnants will continue to lift grey streaks even after several wipes of the alcohol. To me, alcohol is a waste of time, and could actually be counterproductive. The CMX people suggest using lacquer thinner, a product that Doc Wayne over on MR forums claims to have used for years to good effect. However, that fluid is well down 'the list'. So, since the list says kerosene is the #1 best solution, I have taken to using it in the car. So far, no complaints, and my engines run well. I don't scrub the rails with a clean cloth afterwards, but prefer to leave the thin remainder of kerosene atop the rails to act as a retardant to further oxidation of any metals that oxidize quickly, chiefly the heavy concentration of elemental copper in nickel silver.
