a good AHA product that contains glycolic or lactic acid will speed up the healing process. I remember when my redmarks would stick around for months and months at a time now that I exfoliate they tend to fade away a lot quicker (weeks instead of months)
the issue here isn't the sweat.. it's the fact that many people don't even realize what lurks in their pillowcase. Many go to bed wearing loads of hair products on their head. Eventually, if you don't change out your pillowcases, it can turn into a cocktail of bacteria, dirt, oil, (god knows what else) that can worsen breakouts.
changing my pillowcases made a big difference in my skin. I tend to sleep on my side, which means my cheeks are often next to the pillow. It took me a while to realize that I was breaking out on the exact same spots where my skin touched the pillow.
now I switch pillowcases every 2-3 days and no fabric softener.
The 2% BHA liquid is quite potent compared to the other BHA formulas. I wish they'd make a 1% BHA liquid.. If your skin is becoming dry/irritated, try switching to a different BHA formulation - either the 1% gel or lotion.
I'm also a fan of skin balancing moisture gel, but it's not going to be very moisturizing if you have extra dry skin. For the dry spots on my face, I love using either the Hydrating Treatment cream by Paulas Choice, Cetaphil Cream, or Dan's moisturizer.
There is no BHA 8% gel -- BHA comes in 1% and 2%, while AHA is 8%. Click here to learn about the differences between the two. What kind of scarring are you referring to? If you mean red marks, then yes - these products will help decrease the appearance of them over time.
Yes you can use them together. Obviously that isn't part of Dan's regimen.. If you were to use them together, you would have to use less BP than Dan's recommended amount and only apply it to problem areas. The BHA should be applied before the BP.
Mandelic acid isn't better or stronger than any of the other Alpha hydroxy acids. Glycolic acid is generally considered the most effective AHA, and there's plenty of research out there that proves this.