..needs a good scrape and clean then get a 6" bit of copper pipe and flatten in the vice and drill a hole in the end..drill a hole right through the bench then grind the galvanizing off and put a dome headed fencing bolt through and bolt the "copper strap" to the underside and bend it down, this now is your earth strap for the welding clamp. if you keep the bench clean and very lightly oiled then the spatter which is giving you a bad contact will not stick to the top....When your welding becomes better tell them Roofman off the internet put you wise
