Got a Bachmann 2-10-2 locomotive that I want to strip the lettering from the tender. Tried 91% alcohol which I have used in the past with success but it didn't seem to phase the lettering. Prior to using alcohol I used Chameleon stripper but I haven't seen it around in a long while. I am aware of ELO and brake fluid being used to strip lettering also. Anyone have any recommendations? The bottle of alcohol I used was several years old. Does alcohol weaken with age?