Antichode, a mix of acetone and d-limonene can approximate the qualities of MEK, so MEK is not really needed.

To do the cleanup with acetone and d-limonene, put 200 mg of impure mescaline acetate in 20 ml of d-limonene, and then drop wise add the acetone until the d-limonene starts taking on an amber color. Keep note of how much acetone was added. It might take 1 ml or more. I don’t know yet. At a certain point it will dissolve all the amber impurities and leave behind off white mescaline acetate. This is a little trickier than using MEK because if you overshoot the acetone you'll lose yield. You just need to add the right amount.

SWIM will look into developing the right acetone to d-limonene ratio for this clean up and will add it to the tech later. Acetone is far easier for some people to get than MEK is.