Some folks have acetone in their garage and or paint remover yes it can be harsh but should easily remove paint off the ego tank.
When i was stripping a few lionel trains i would use the paint remover and then a wooden handle brass brush dipped in acetone can and it took off paint in hard to remove area's.
Some have dremels like me and they come in handy for such small projects as one mentioned for tank base
there is a round shaped buffing wheel that is embedded with emery that will remove the base paint as well.
Forget the wheel number.
When i was stripping a few lionel trains i would use the paint remover and then a wooden handle brass brush dipped in acetone can and it took off paint in hard to remove area's.
Some have dremels like me and they come in handy for such small projects as one mentioned for tank base
there is a round shaped buffing wheel that is embedded with emery that will remove the base paint as well.
Forget the wheel number.