Will mineral spirits (aka paint thinner) followed by soap and water remove the mold release from these castings?
Calapooia,
You don't need that strong of a solvent to remove mold release. Simple dish washing detergent (e.g. Ivory or Dawn) in warm water will do the trick. After that just rinse off in clean water and let dry.
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.