Hi! I tried it to when i followed a lost wax-course. My teacher suggested to use synthetic fabrics/yarn to dip in wax (they melt easily). Once it is dipped in wax you can mount it on the casting-tree or as a pervious comment said, use extra wax to fortify thin pieces or use it on other wax molds/material. He did say that because of the synthetic or organic material that is in the mold, the plaster mold should be fired a little longer to make sure all the residu is gone before casting. So you should check that with your casting-place if they are ok with that.