Here is the progress after 24 hours of soaking and gentle brushing with a plastic bristle scrub brush. For the honeycombed areas I have been using a .45 caliber plastic bore brush, though a shotgun bore brush might be a better fit if I could find one. The Super Clean is even progressing well on the the thick argent paint material on the inside of the grill. There has been no effect on the plastic so far. It is still hard, no softening of the outer surface whatsoever.
