Years ago, I had this guy from my hometown that moved to Texas and started bringing me big ass loads of weed. After a bit, he started bringing me 60 gram "baseballs" of potent tar. Since I'm from the East Coast, none of my buddies and clientele really had any idea what to do with tar (how much was a shot, that you use a bunch more water compared to ECP, and so on). I had to turn it back into powder using a method taught to me by a buddy that lived in Cali for a few years. I would put the ball of tar into the freezer for 30-min to an hour, then weigh out my cut (I normally used Isotol/Mannitol for whack on packages of ecp, but he said lactose/milk sugar and that's what I put on it). Grind them together in an electric coffee grinder you've lined with plastic baggie for about 5-10 mins on high speed and sift in a screen/sieve, just like you'd whack ecp. Let it dry for a bit, do some and see if the stuff is how you want it. The bth I was getting was very potent stuff, idk what you've got, so you be the judge on how much whack you put. A good way to see if you have "reconstituted" tar (I always shot my dope, so idk if it gets sticky trying to snort) is to see if it has the shoe polish and vinegary smell (that's what I think it smells like) that is the characterisic smell of bth. Hope this helps.