TD makes me miserable lol. The best way i have found to mix it was in a plastic baggie with the oil. Its time consuming, but at least you can see and squish in any lumps of td. When im satisfied, i squeeze the mix into a corner and snip it over the batter bowl. But its still not perfect. I have still gotten specks that way.
I bought mine at WSP. Its supposed to be oil, but im really not sure, because i have mixed it with water, and although it comes out smoother, i get glycerin rivers. It looks nice in a couple of my soaps, but not all of them.
I have kind of a large supply that i need to use up. I purchased 2oz, but they sent me an enormous bag of it. I am probably going to go with micas after the TD is gone.