You will need about an ounce of good quality cannabis to make the oil to treat skin cancer. With this amount of starting material you should get 3 to 4 grams of high grade cannabis oil. You will apply the oil directly to the skin cancer and cover it with a clean bandage. RE-apply fresh cannabis oil every 3 or 4 days as well as a new bandage. Continue treatment until the cancer is gone. Once the cancer is gone continue to treat the same area where the cancer was for about two weeks just as if the cancer was still present. Doing this helps ensure that all the cancer cells die. If you’ve had skin cancer for a longer period of time, it may take a longer time to cure. In most skin cancer cases, the cancer disappears in less than three weeks. In extreme cases it could take longer. Just continue the treatment until the cancer has dissapeared. The speed of healing all depends on your own rate of healing and how deep the cancer is.