XPost: alt.home.repair   
   From: minoru.osaka@asahi.net   
      
   On Thu, 20 Apr 2023 15:14:21 -0700, Bob F wrote:   
      
   >> I guess I could use phosphoric acid but is there any harm to using gas that   
   >> comes from a can that has surface rust covering the entire inside surface?   
   >   
   > I wonder if a rust converter would produce a gas resistant protection.   
   > It could be worth contacting the manufacturers of a couple such products.   
      
   I actually had thought about that when I remembered that I had an old jar   
   of phosphoric acid in my chemistry kit which I haven't opened up in years.   
      
   I ran an experiment on an old rusty pair of shears left outside too long.   
   The phosphoric acid turned the metal from pure rust to black "something".   
   I don't know what that "something" is, but it's black, whatever it is.   
      
   I guess I was supposed to wash it off but I just left it on.   
   Is it too late to wash it off two days later?   
      
   The black is all dry now. Not wet. I guess I can scrape it off. Maybe.   
      
   I'm thinking maybe I can pure some of the thick clear phosphoric acid into   
   the gas can and shake it around, but I only have about two ounces left.   
      
   I've had it in a labeled glass jar for so long I forgot how I acquired it.   
      
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