Galvanizing is a "hot dip" process. If you inserted plastic plugs they would just burn off during the process. If you use metal plugs than they would be permanently installed in the threaded hole after the process. Only way to galvanize the frame is to just dip it and re- tap the holes. Steve --- In dmcnews@xxxx, Martin Gutkowski <webmaster@xxxx> wrote: > Someone asked Mike Loasby this at Eurofest. The reason is that with all the > tapped holes in the chassis, it's much easier to plug them with plastic > plugs, and coat the frame in epoxy (which won't stick to certain plastics),