Not the best example. Hydrogen peroxide is actually rather nasty when highly pure. I mean, it's got nothing on FOOF, not many things do, but it's still in a class where it needs to be handled with care and shouldn't be handed to non-professionals. Don't be fooled by the fact it's sold in grocery stores at low concentrations.
Pure hydrogen peroxide will do a lot worse than burn on contact with an open sore, unless you mean "set your sore on fire" (though it's more likely to detonate, or spontaneously dissociate into steam and pure oxygen).
Usual solutions for disinfection are 3~5%, at 35% h2o2 will bleach skin, and bite through it.
30% is non-chlorine pool shock, and readily available where I am (VT). As it happens, it's also one of the parts of two part wood bleach. The other part is a solution of NaOH (lye, available in solid form for drain opener). Works great, best used while wearing gloves and a face shield.