Yes, that was me. I added several posts about this and also discovered that hydrofluoric and hydrochloric acid are both used in oil fields.
Hydrofluoric acid is EXTREMELY dangerous and also deadly if not handled in a chemical fume hood wearing proper safety/body protection. The way they threw it around in the Breaking Bad scene was ridiculous. A drop on the skin can cause a burn that could go through tissue/bone that you may not even notice immediately. I highly doubt the concentrated formula could be found in a hardware store in Canada!