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« on: 08 October 2011, 21:44:42 »
I was really struggling with oxy-acetylene welding(cutting wasn't a problem) until I did the evening car restoration course at the local college. Most of the class had done no metalwork at all, and Doug started them with MIG welding("Turn it on, point the gun at the metal and pull the trigger. I'll come round and talk to you"!) He sorted my problems in 5 mins(too much oxygen, too close to the metal), and I was doing presentable welds about 10 minutes after that. Those 3 terms were the best money I've spent in over 20 years of working on cars.
Even with MIG, which is the simplest and what you want for car bodywork, it's MUCH easier with someone to point you in the right direction.
As for £400 AC TIGs, are you sure? Mine was £1500, and it was the cheapest I'd seen. Surely those are DC machines, and therefore no use for aluminium.
Personally, I don't find much use for TIG on car bodywork, unless you're doing metal finish on exterior panels. In which case, you already know what you're doing, and can advise us! And even then, oxy-acetylene will do the job.
If you're only going to buy one welding rig, it HAS to be oxy-acetylene. It will do anything you want on a car, plus cut, and heat up rusty bolts etc. And you'll be able to use it anywhere, anytime. Exhaust manifold nuts or flanges are rarely a problem once you've got them red hot a couple of times.