Ok, I have about a billion barnacle pads to remove from the bottom of my boat. I understand that the pads are comprised of barnacle glue attached to the boat and on top of that a disk of calcium carbonate from the shell of the critter. My plan is to chemically deteriorate the calcium carbonate with muriatic acid or Snobowl toilet cleaner and scrape with plastic paint scrapers. Both chems are reported to do a great job from my web research. Also, gelcoat is SUPPOSED to be impervious to the effects of both of those two cleaners.After the chemical/scrape work I plan to use wet/dry paper 400, 600, 1000 and then buff/polish with a white cream like Dupont's 7 or something similar.Am I on the right track? Any suggestions?Has anyone ACTUALLY had a bad experience with muriatic acid or Snobowl on gelcoat?