Scott, I find it safer to use a towel and an iron (preffered), or brown paper and an iron.
Place the towel or paper over the wax, apply the warm iron on top of the wax, then slowly pull the towel or paper away.
As the wax melts, it will transfer to the paper, and as you are dragging it, it will have a fresh area to melt into.
Be extremely careful with polyprops;
Hope this helps.
Cheers,
Shorty.