I’ve only started to use honey & clay masks (mine is homemade) so I don’t know too much about them, but I love mine so far. The recipe I use is: 1 heaping tablespoon of raw honey, 2 heaping tablespoons of bentonite clay, and some hot water until the consistency is right.
According to The Honey Cult, Fuller’s Earth Clay is the best clay for treating acne. I bought my clay off of Amazon, and I think you can find Fuller’s Earth Clay there. I would say bentonite clay is probably good for oily skin too, since it still has drying properties. I use mine for oil regulation and it seems to work well!
I found out about DIY natural clay masks from Veronica’s beauty videos. She’s an aesthetician of ten years, and she recommends starting out with a 2-week daily honey/clay treatment (after that, you just do it a couple of weeks). I highly recommend her videos! She also talks about what ingredients to use/avoid in DIY beauty masks.
Hope this helps!