Pure mescaline is the only way to fly.
That was 69ron's opinion. He explained all of this but for those that missed it, at least one of the chemicals in that sticky orange/brown gunk is a sedative. Comes on before the mescaline and lasts a couple hours. Generally makes the experience more dreamy. Why not try it both ways and choose for yourself.
The MEK must be cold as your freezer can get. Do not allow it to warm up at all. Put your dirty mescaline in a small beaker, cover with foil and chill it in the freezer as well. You don't want the cold MEK to be warming up after it's in the beaker with the mescaline.
After pouring a relatively small amount of freezing cold, anhydrous MEK into the small beaker, vigorously smash the dirty mescaline up for a few minutes with an implement of some sort that can used like a pestle. A flat-ended piece of glass rod for instance. Cover the beaker with foil and put it back in the freezer for 4-5 minutes to allow the mescaline to settle. Handle the beaker very, very gently when removing from freezer and pouring off the orange/brown MEK into a glass casserole dish. You don't want to stir up the mescaline.
Repeat a few times. Some mescaline with come over with the gunk but will tend to be mostly separated into a whitish spot that can be scraped up.
A buchner funnel/filter and filtration flask with a hand vacuum pump is the ideal tool for removing epsom salts from your solvent.
"The cost of sanity in this society is a certain level of alienation." - Terence McKenna