Castor oil applied directly to seborrheic keratosis is softening and dissolving the growths. Rubbing it in is good too.
I have fought these keratosis and have gotten rid of all of them once my rubbing castor oil on them once a day. It took about 6 months and one day I just noticed they were all gone. Castor oil is very oily so if you try this wear an old tshirt or something you don't care about getting oil on. I have bought some wart remover and I'm going to see if that will work. I dislike the way they look but mine itch like crazy and I'm tired of having them.