Re: How long does it have to sit for..?
I use cayenne pepper for wounds regardless of the size. If you were shot with a shotgun in the gut, cayenne pepper could save your life, you would pack the entire wound with cayenne pepper powder. It is ideal to carry in the car, in a wreck you could bleed to death, cayenne stops bleeding.
There is very little written about the use of fresh cayenne, you normally use the powder for all wounds.
I use the Burn and Wound Amish salve and mix 1/2 with pure African Bird Pepper and use this as my cure all salve. If it is just a burn, you never use cayenne at first, just the straight B&W salve.
I am pretty sure I am the only English person that has the Amish B&W salve, I actually made the booklet that the Amish give with each order or sale for $3.95. It explains how to treat burns the no painful way.
Cayenne can be used so many ways.
MH