Aluminum can be a tricky to weld, but Hobart’s DP 3545-20 spool gun allows the proper welding of aluminum from 18-gauge to 1⁄2-inch.

That lets us use the “big MIG” for most of our welding, and the spool gun for long distance welding. One concern with using a spool gun to weld on big equipment is that the welder’s ground ...