It is but it can be done I'm doing it. I welded in floor pans and cab corners on my buddies truck. You just gotta go slow Idk all the proper terms and procedures for welding I'm self taught thru trail and error lol. But I will get a bead going and let of the trigger for a split second and get right back on it and just feather the trigger will I pull the bead it keeps me from blowing thru. Idk if that's a thing your supposed to do or not but it helps me.
