On Mon, 10 Mar 2008 18:56:12 -0700 (PDT), Bob AZ wrote:

. �I wish to tin them and can
either cart them off to an electroplater or tin with solder. �

Several have addressed the type of plating.

My suggestion involves the heating. If Mama will allow preheat them in
the oven. Perhaps this will be hot enough for all the heating they
need.

Eutectic solder melts at 361 F. The oven will do fine.