Percentage? I see a peel that's 40% and one that's 10% and I don't want to melt my face off.Mandelic acid (toner and/or peels) and a manual comedone extractor.
The blackheads on my nose literally poured out of my skin after three days of using mandelic acid toner. It makes them really easy to extract and keeps them from coming back. My mother and husband both had similar results.