I'm having a terrible time with welding 4130 tubing, I have a Dynasty 350, I am welding 1.25 .095 wall 4130, I have cleaned it with a die grinder with a red scotchbrite pad, then wiped them with acetone. I am using about 90-100 amps, 3/32 2% with ER70S6 1/16 rod, 15 on the argon...........every weld is too hot, very gray, I couldn't get a shine out of a weld if you paid me. What the heck am I doing wrong.........very frustrated.