I can only tell you what I have done, which seems to works for me. I use Skinceuticals gel peel gl at home.
I first went to a spa and had the peel done professionally a few times, I asked questions as she went along. I than found a reliable place to purchase the peel from, I have done two peels at home with much success.
I know people here feel that it really should be done by a professional and it probably should be done by a professional. But I am very careful.
I plan on going back to the spa sometime in Dec. to a professional to see how my skin is doing and to refresh myself on doing the peel properly myself.
I am by no mean recommending for anyone to do the peel themseves, I am just stating my experience.