[Chas]

Any petroleum based solvent paint stripper will work O.K. So "should" citrus, but check for any reactions in a hidden area.

Any "pot" metal of aluminum, zinc alloys metal will react with base chemistry strippers such as sodium hydroxide. Acid or alkali baths to attempt electrolysis will be destructive as well and may actually penetrate stress cracks and do its damage over time.

Many solvent strippers have gone away so choices are getting limited..

May find that a 'gel' stripper is a good choice and that for cleanup, animal bedding made of wood shavings works well to wipe off spent stripper and will not scratch the surfaces.

If the lamp body proves to be pot metal, seal the interior as well as the outside to reduce the absorption of moisture in the micro cracks.

Pot metal generally gets as hard and as brittle as pottery, cannot be drilled to any extent and should not be heated with a torch or heat gun. Any divots can be filled with Bondo and smoothed before a sealer coat and then finish. Consider a toner or antique like finish, helps to hide any flaws and avoids the look of a "paint job".

GL

Chas