That works, and I have done all that. but it is messy as heck with all the dust from the wire wheel. Plus ya better wear a respirator or your gonna be blowing charcoal briquettes for nose boogers for days. Soak it well w WD40, wait a day or 2, start scraping with a sharp edged scraper with some big sheets of paper underneath . Most of it will practically fall off in chunks in most spots. Anything that's still attached, reapply WD40 and wait a day or 2 and try again. All of its messy, I find the wd40 method to be less messy.