I just wanted to let everyone know that I found a gallon of Muriatic Acid at LOWES Hardware for $7.28 a gallon, and found it in with the paint thinners and furniture strippers aisle. Its made by KLEAN STRIP and is 20 Baume - Hydrochloric Acid 31.45% by weight. I was wondering if anyone has used this for Aqua Regia formula? Would it work? Still trying to learn the percentages of each acids and just wanted to make sure it was strong enough for this process before I purchased. Also being new at this and new to this forum, I was wondering if there is a section in this forum to cross-reference abbreviations people use all the time? This forum is absolutely fantastic, I have spent many hours reading posts after posts and trying to learn as much as I can before I start asking questions. Would it be beneficial to people here to have a section on cross-referencing for example: AR = Aqua Regia, etc etc. After spending time reading these posts its second nature remembering the ones you see time after time that people use but there are also the ones I see and forget soon after, and I might not see again for a very long time. This is just a suggestion and not trying to make this difficult (or maybe I am) but I think this would be a great tool, and I am talking about basic abbreviations not complex so people don't misinterpret the wrong information. Safety is always a issue. Thanks for reading and maybe this is just my stupid thoughts running around in my head today!