Am considering using this to darken wheels and drive rods on steam loco and FasTrack rails.
Any advice on its use? Where to OR not to use it? Is it permanent? Scratch and rub off resistant? Will oil or grease effect it? Does it have a shiny or dull appearance? Can objects be made progressively darker with multiple coats? Does it brush on smoothly and evenly leaving no brush marks? Drying time? If I'm unhappy with its results, can it be removed without permanently altering original finish or objects it was applied to? Any electrical or insulating issues I should be concerned about in connection with its use? All suggestions, hints, etc. about it are most welcome. Thanks.