Mold material or coating for MDF

I made a mold for a custom license plate out of MDF, which I initially intended to use for casting pewter or tin. I've done that, but wanted to try a resin cast for something lighter and paintable. Is there a way I could coat that MDF mold with a thin layer of something (like spray silicone?) that would allow me to use one of your resin products? I did some test pieces with the amazing casting resin and it seems like it would work perfectly.  

Thanks