You could use the blow torch. I haven't done it that way. Scalpels are sterile when you buy them in most cases. I wouldn't use Neosporin until the second dressing. The wound needs to dry under the bandage to scab up and close. Neosporin keeps things soft and moist allowing a deep cut to open up again. Good for abraisions and skin but I wouldn't use it for a few days until it's scabby just to prevent a secondary infection.