[header] How to brew san pedro cactus [title] Skin your cactus. [step] Start by de-spinning the cactus and cutting slits down the length of the cactus. You can then carefully peel off the waxy skin of the cactus (illustration is wasteful of green flesh). 
Then take your knife (preferably a serrated knife) and cut away the dark green flesh until you get to the core. Dispose of the waxy skin, core and most of the white flesh [title] Prepare the flesh.