Yes thanks all I will be firing up the welder this weekend, I have this...
Solar powered auto mask (need to check if batteries are replaceable) and leather gloves.
One of these...
and 0.6 and 0.8 mild steel wire, regulator, gloves and gas...
(93% Argon, 5% Carbon Dioxide, 2% Oxygen)
I had a chat with Yoda yesterday (Frank Catt) and he suggested starting with mild steel plate (I will use 2mm plate before trying 1mm plate) with one plate overlaying the other and welding the joint. I also will try fill welding where 3mm holes are punched in the top piece of metal and welded to the piece below it. Used where a spot welder cant get.
I will be getting a spot welder for the roof sections and some of the chassis also and then maybe get a tig welder and see if I can magic up a set of headers.
I'm in the process of setting up a welding area in the shed and have fire extinguisher and will also have a 30 minute 'fire guard' rule where I will stay in the work area to prevent any fires.
I also plan to test the welds to destruction and I've been told to check for the correct penetration when welding sheet steel. Once I have mastered this I will buy an air supply welders mask and tackle the zintec chassis.
Thanks again for the advice and I will let you all know how I get on.