I'm sure this has been discussed before, but I couldn't resist trying it anymore so I gave it a go. I have a box of 200 gr RNFP .431 commercial cast bullets that lead something terrible due to a bevel base and some sort of super hard dark blue lube (SNS brand). I figured some better lube may help the leading issue so I put 50 of them in my TL tupperware and dropped a pea-size piece of JPW in and gave them a good shake. It coated super easily with minimal shaking and no nasty brownish-hue that you get with LLA. I set them out to dry while I loaded some other rounds. Within an hour they were dry to the touch and pretty slick. I'll load them up in 44 special tomorrow and shoot them as soon as it gets above 20.
I've got my fingers crossed that straight up JPW will work as a TL for standard velocity pistol rounds in 38, 44 special, and 45. It goes on super easy, dries fast, and doesn't discolor boolits like LLA does. I hope I'm on to something here.