Posted 8 Months, 4 Weeks ago Tradingsfuture Senior Boarder Posts: 57   I generally weld (sheet metal from 12 to 18 gauge) using oxy/acet rig. Recently, ran out of gas, but need to tack something so I used studio partner's MIG (flux core wire .035 The administrator has disabled public write access. Posted 8 Months, 4 Weeks ago mathman Senior Boarder Posts: 51   Yeah, well, that's true. But there is a price issue. I doubt that I'm burning it up but you might be right. This was my primary concern. All true. My preference is for O/A or Arc for thicker than about 14 gauge. The administrator has disabled public write access.