I posted a link in my last reply. They are water based dyes. You can get some colors at Woodcraft.
Basically, I turn and sand to 600, then remove the blanks from the lathe. I suspend them on a string run through the tubes. Then I apply the dye with a rag. Usually one coat is enough, but if you want more feel free. I let them sit at least overnight to ensure the water is all evaporated. I have let them sit much longer with no issues.
Then back to the lathe. I haven't had any issues with grain raising from the water. I do "burnish" with a paper towel at high speed. Then I finish with BLO/CA.
Just make sure the dye is good and dry or you'll have problems with the CA.
Oh, and I wouldn't try to use any solvent, DNA etc. prior to the BLO/CA. You want that color there.