I never used the first ones you mentioned...just the pink Met Al Gl. It is great! I used it by hand polishing and cleaned up with corn starch. There seems to be no real cut to it like coarse rubbing compound types...Nuvite F7 or Gravel in a bottle. If you get the really rough corrosion off the final polish is GREAT..
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."