From: muratlanne@gmail.com   
      
   "Snag"  wrote in message news:10djshq$6v3d$1@dont-email.me...   
      
      My $30 yard sale bottom pour lead pot drips . A lot . I've cleaned up   
   the stopper rod with no noticeable slowing . The bottom of the hole has   
   some crusty rust That I haven't been successful at removing . I see 2   
   options - try to match the taper of the bottom of the hole (drill bit   
   isn't the same) with a dowel and lap it clean or try using Evaporust to   
   clean it up .   
      If anybody has other options I'd like to hear 'em . I'd really like   
   to use this over the dipper and pot , I've started casting balls and   
   bullets for some of my neighbors and this is faster and less spillage .   
   Snag   
   ----------------------------------------------   
   Hydrochloric / Muriatic / pool cleaning acid dissolves non-oily rust very   
   quickly, vinegar, Naval Jelly or battery acid more slowly. Baking or washing   
   soda will stop the action when you see bare metal.   
      
   The stopper could have a similar or the same taper as the hole, perhaps you   
   could copy it to a D bit? One way is to chuck it on the lathe and match the   
   compound to the taper angle. For a tapered recess I molded it in polymer   
   clay, baked it hard and measured the angle, then turned and hardened a D bit   
   to match.   
      
   I mentioned using a bronze gun bore brush to reduce bolt thread rust through   
   a hole in the car frame because it worked better than I expected. I haven't   
   found a source of small straight fine wire bristled brushes to customize and   
   clean rusty recesses, it was the closest. Another that helped on my 91   
   truck's electrical contacts was pipe cleaners with stiffer bristles,   
   Dill's -Bristle- Premium Pipe Cleaners in a red sleeve.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)