I use 2 3/8 and 2 7/8 used pipe around the place and its magnetized and when i grind on it it makes worse . Using 6011 on dc+ it will just burn the rod up from sticking if i turn it to dc- it will weld . It's not supposed to be used on that polarity will the weld be alright ? I tried wrapping the gr lead different ways and other things but nothing has worked its mostly just pipe fence .