been practicing on and off on steel and alloy bits ect but last week i decided to get some alloy 2mm plate and try weld it into somthing so i roughly sliced 4 sides up on the guiloteen and proceeded to attempt to tack them togther, and it was pretty dam crap, tried to tack them without filler and ended up burning holes and the pools just not joining up, im using a miller 275 ac/dc non inverter tig with the knob set to near on max cleaning later on for welding as i was having trouble getting nice welds, using 9l/min argon, now ive not been able to get anything but a dedicated stainless wire brush for cleaning prior to welding, i couldnt find any acetone anywhere, im gona upload pics in a min,realy need some training i guess