Has anyone used Pure Oxalic acid for cleaning hardwater stains off windows? How does it compare to Barkeeper’s Friend? Do you have to dilute it with water, or any other special techniqes to prepare it?
Is it still alright to use 0000 Steel Wool with Oxalic Acid or BKF, or does the chemical reactions make abrasion unneccessary?
Also, is Bronze Wool Always fine enough to not scratch windows? It doesn’t seem to be graded the same as Steel Wool.
Thanks all, this is a great forum and I really enjoy browsing it and learning what I can.