Milk Salves
People used to think that milk had the same blemish clearing properties that something like salicylic acid had. It doesn't. But that doesn't change the fact that virtually every American woman was sold the milk salve treatment in the early 20th century!
Ridding of Birthmarks
In medieval times, birthmarks and moles were associated with witchcraft. People came up with varieties of blemish removing methods, like burning, cutting, and tearing skin protrusions off. Oh, there were some herbal remedies too.