Steam before peeling?

To be honest, there's no sense to steam before AHA/BHA. If you would use mask with linen seed that is supposed to "open pores" then it has sense since mask and steam help to remove bad stuff from pores, but with acids you don't need that :)

I wouldn’t do all of that. I would just make sure my skin was clean and try not to aggravate it too much before using such a powerful exfoliating product.