Background: In making some masters for casting that I'll use in a detailed
O-scale (1:48) model, I'm sculpting clay (Sculpey) parts that will
supplement some commercial white metal (?Zamac?) castings. To make the clay
release from the metal easier, I'm spraying the metal with a silicone spray
lubricant before slapping a slab of the clay onto the metal -- and this
works nicely. And it apparently doesn't interfere with the firing of the
Sculpey afterwards.

BUT ... and here's the metalworking content: I need to clean up the metal
parts that I've sprayed for later use. What solvent would be suitable for
getting the last residue of silicone off the surface so I can glue something
to it later?

TIA
Norm