The way the car is supported might raise a few H&S eyebrows. But isn't that the petrol tank he's welding? Perhaps the guy is after £150 for sending the video into that telly program.
the differance between Co2 and argon is hot gas and cold gas, because argon is whats known as a hot gas you get an even temerature between arc and gas therefor less spatter and a neater weld, at the end of the day just grind off till its tidy, and you can do a good job with Co2, i picked my first welder up 105 sip and have had loads of practice and done me homework, and have no probs with Co2 for the type of work that I do, which is body panels, the other good thing aout argon is its better for stainless
I have used 300g refillable CO2 bottles from Sealey Tools for many years.
They have been discontinued recently and replaced with 1kg refillable. This costs £35 (one off payment) and then about £8 to refill (you swap it with a full bottle at the Sealey dealer). It should last several hours. It has the same connector as disposable bottles so no need to buy a new regulator.
I use an SIP Migmate 100 and have restored a Triumph Herald, 2 Vitesses and a VW Type 2.
There has never been a problem with making good welds so long as all rust is ground off first. Black and Decker 1/2" belt sander good for getting in tight areas.
The main problem is the thermal cut out tripping if I weld continuously for a long period - a larger or fan cooled welder will not suffer with this problem.
Cheers for the advice guys. I've not plumbed in my big bottle of CO2 yet, still going on the little disposable bottle that comes with the welder! I had a play with a friends welder at the weekend, a Clarke 150 turbo running with an argon/CO2 mix, couldn't see that much of a difference, but we were welding outside on a pup of a rusty old '69 bay window Devon camper!
Here's a pick of my very first attempt at welding on the Kombi, it ain't pretty, and this is the good side! My main problem is getting comfy underneath, holding the gun steady with one hand and mask in the other. It didn't fall off though when I tested it... (a few hefty kicks from a size 8 British Army boot :twisted: )
And here's my first go at butt welding on the wheel arch...
I'm really enjoying learning, I just wish I could put more hours in! (to cold in the evenings :evil: )