409, Fantastic, "Scrubbing Bubbles".... all about the same. I have rigs which I cleaned using 409 and/or "Scrubbing Bubbles" in the mid-late 1990s. I rinsed them off ( well, I thought) and sang the praises of the stuff at the time. Today, those rigs have blue-green corrosion around the screw heads. We live and learn.....