I accidentally healed my KP with CASTOR OIL
Not sure if this is going to work for everyone, but it worked great for me.
I've had KP on my bum most of my life. I've also used coconut oil on my skin for several years, no effect on my KP at all. I like it for the other benefits.
And there's a particular recipe that I love of coconut oil infused with flowers that I make at home and apply on my skin regularly when the weather is colder. Last year, however, I had extra castor oil at home, and decided to add to my infusion, as it is also great for skin.
I few months later, when I touched my bum (and after several days without applying anything on my skin because the weather was too hot), I did not feel the bumps that I always used to feel. I went to check it on the mirror and no signs of KP! There's still a bit of pigmentation, but it's 90% better and the skin is smooth. Its been several weeks now and the condition has not returned.
The mixture was like 80% coconut oil and 20% castor oil, but if you can tolerate castor oil smell, using it pure might give you results faster. it's very sticky, though, so I think diluting might still be a good option