I actually used the same thing for a growth in the back of my scalp several years ago. It does work, but it will eat any skin that it touches. Try to get it just on the cancer. I had something recently on the side of my nose that got a bit raised and just started putting castor oil on it about 3 or 4 times a day. It is almost gone.
I was looking for it to put on this new thing, but couldn’t find it. The castor oil is gentler and not making a hole. Just drying it up and it’s coming off. The stuff was made with eggplant and I think came from Australia, if I remember right. Started with a C, but I can’t remember the name. Pretty sure it started with a C.
Yes, that was the name of it. Cost around $100. Mine was difficult to treat because it was on the back of my head in my hair. It did work, though. I agree that natural is best.