Since the previous stove is out, I took the oportunity to clean the soot, grime, etc from the fireplace that hasn't been cleaned for probably 30+ years. I should have done this before the previous stove install but didn't. Fireplace is circa 1975, and used as such until we moved in-2007. I don't know how much the previous owners used the fireplace but judging by the 4 applications of Speedy White and several hours of scrubbing with a wire brush, I would say alot. This is about as clean as it's going to get and with the Oslo being installed on Tues I don't think you will be able to see behind the stove much anyway. Before and after pic. Anyone have any better luck with a different cleaner?