I am now at the point where I’m ready to take my Griffin radiator over to a TIG welding buddy to add some NPT “bungs” and close up some of the original holes left when I removed the 1.5 inch hose fittings.  I remember reading a decade ago that when one welds on an existing radiator it’s a good idea to put wet towels on it, to dissipate heat, etc.  

Is that a required practice, and are there any other techniques / procedures we need employ to maximize the chances for a good outcome?

thanks.

Doug