I not going argue bu coin dealer for 50-100 yr Have been using this method.it just rare that someone tells the public.THE END
If toning came off it was not NT. Acetone will only remove organic material and sometimes it's mistaken for natural toning. It's good to lose it. Congrats. Lance.
I suppose I should point out that coin dealers have also been whizzing, polishing, dipping, nose-greasing, and who knows what else for that long, if not longer. For most of that time, there were no TPGs to weed out the coins so treated. Things do, in fact, change.
No! Olive oil is used to clean ancients, but it is a weak acid and will attack coin surfaces. I don't even like it for ancients, preferring less corrosive methods. Like many have said, acetone is fine, and I would rinse with distilled water. This is VERY important. It has to be distilled, not tap water, not bottled water, not mineral water. Distilled water has all of its minerals removed, so it will try to grab anything on the surface off your coin, will not have chlorine in it, and will evaporate completely clear. I gently pat my coins dry after thoroughly rinsing in distilled water with soft cotton. Even this patting shouldn't be done with a higher value BU coin, but for ancients its fine. So OP, did the acetone remove obverse toning as well as reverse, or just the reverse? If only the reverse then you are fine since that was not toning anyway. Chris
I never whizzed or dipped any coin only Acetone & very weak vinegar or for a corroded olive oil & that all But one did tone on it way to Ngc