If the off color and stickiness of the xtals is unwanted, maybe an EA defat of the outer skin powder could be worth doing. Also there is the brine wash idea mentioned before.

I for one have not noticed any difference in effects if the color is not fully white and/or if the xtals has some tackiness in the more straightforward/simple extraction. The only reason I would add this extra steps is if there is a more difficult cactus source that gives goo with the simpler TEK.