I just make sure it is warm enough not to glop and ball up when I smooth it on with the t-shirt material. I tried using molten wax one time and it just sort of went straight through the paper. I am sure with some experimentation on old prints a way could be found to make this work with liquid wax. Then you could call them platino-encaustic prints. Hell, if you can smear wax on an inkjet print and call it an encaustic print, this would be no big deal.