Back at NRL I used to make what's called Pirahna Solution. It was Hydrogen Peroxide and Sulfuric Acid. There was some serious heat of mixing so I had to do it very slow in pyrex. The glass would get so hot that it would burn the clean room paper underneath the glass. Nasty Stuff. It was great at cleaning substrates. Next to working with Hydrogen Fluoride (Lethal Stuff), Hydrogen Peroxide was my least favorite stuff to work with.