[Arran]

Well vinegar is an acid, so anything soaking it it should be monitored, pot metal (probably Zamak metal) has zinc, and aluminum in it so both can corrode. Brass is usually all right with vinegar, even if it ends up coppery I've found that it's often just on the surface and will polish off. The point being if you are not sure what vinegar, or any other acid will do to a part, don't drop the part in a bucket of it and leave it for days unless it's a lump of heavy cast iron.