Combining Microdermabrasion and Light Chemical Peels - Which Comes First?

I've seen a few posts regarding this topic but the one question that remains to be answered is: "Which comes first, the abrasion or the peel?" I know it is common practice to combine light peels and different types of abrasions but in a classic scenario with, for example, a glycolic peel and a microderabrasion, which one should be performed first? In theory the peel would prepare the skin for the abrasion whereas if done in reverse, the skin may react adversely to acid, no? Please advise!