**The molds you make with this process are not for casting food you will eat. You need to buy a specialty silicone for that.**
My supplies included silicone caulk, a caulk gun, soapy water in a cup, wax paper and newspaper and Murphys oil soap, just to make sure the mushrooms would pop out of the mold.
First, I got my fingers wet with the soapy water, and I rubbed a thin layer of silicone onto the piece and let it cure.
Then, after it had dried, I mixed acrylic paint with the caulk and thickend up the surface of the mold. The paint is supposed to aid in the silicone curing faster than it would normally if it had no paint (water-based agent)
to help it dry out. It works. Go to Taxidermy.net and follow Joshua Knuth's illustrated instructions.
****Beware the odor!!!**** Silicone is quite...potent.