I know of Polycast by Polymaker. What else is out there that people have tried and got results with? (I know SLA is the usual choice for lost wax but am trying to make something very long and very flat, and it doesn’t want to print on SLA very well).
Otherwise any other PVB filament, which is what Polycast is. There seems to be a lot of sources of PVB out there, of course you will want to run some tests of your own.
I am guessing the actual wax filament probably does what they claim, in that it burns out more cleanly than PVB plastic.
What results did you get with it?
Never used any of them, just stuff I am aware of as a result of being a giganerd.