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