This past weekend I went to a panel and she said that PlastiDip works amazingly on craft foam. You just need to make sure to be close to whatever your spraying to get a smooth surface, and wear a mask!
Next Up: DragonCon 2015
First Doctor (Bathing Beauty), Tenth Doctor (The Christmas Invasion), Gaz Membrane, Death
2015 Plans: Ohayocon, MARcon, DragonCon