Where is the best place to learn to weld?
I was watching a show on CMT, they were fixing up a guy's dump truck and used a plasma cutter tool to cut 2" holes for round lights. The tool was fast and worked like a compass. What is that tool and what other cutting tools are available.
You weld something critical and it needs to hold up. How do you know the weld is strong or correct without beating up your project testing the weld?
Is it true a beer can can be welded if the welder is skilled?
Does grinding a weld weaken it?