[SEL] Finding ground off serial numbers

[Chuck Balyeat]

 part of hydrofluoric acid,  parts of nitric acid, > >>>>>

Try and buy a wee dram of either and get back to me on how that goes  .
I scored some nitric off the local minuteman and used it straight
to lift some corroded out . stamped in  letters from cast iron ...worked 
good .
fast too. Nasty nasty stuff .



Chuck Balyeat
http://royalcrossfarm.com/essentials.htm