Jon,
I'd misread your last entry - i would advise very strongly against Superstrip in this case - i only ever use it for removing factory finishes. Modelstrip is much, much better as it will just remove the enamel, discolour the etched bits but not damage them. Superstrip is good, but too abrasive for what you need in this case. Don't do it!
If you need any help sourcing Modelstrip let me know.
Thanks,
Andi.