"Rotary Rock Tumblers use a heavier, and usually wet media.
Rotary tumblers are better for heavy material removal and take longer.
They can "reshape" an object, rounding the edges.
They are noisier.
The advantage of a vibrating tumbler is…"
"There's most likely a layer of laquer covering the antiquing. A good paint remover will handle that (wear gloves, work in a well ventilated area or outdoors, etc).
Then you can determine if the object needs further sanding, polishing, buffing…"