I finally bought a welder. Let the learning process begin! My first project was to try to cosmetically refresh the catalytic converter on my 78 Y-82 T/A. My car is more about originality than increased performance. That is why I am retaining the cat.
I can tell you, it DID NOT want to come off of where it has been for who knows how long!
It had a few small and one large rust holes. I cut out the area around the large rust hole, and made a template. I repurposed one of the mufflers I am replacing for metal to make a patch. A LOT of very ugly booger welding and grinding ensued. The metal was too thin for the wire (and skill) I had, but eventually I got the patch looking halfway decent. At least there are no longer holes anyway.
As wise men have said: "A grinder and paint will make you the welder you ain't"
Lots of skill development and practice needed, but it is a start.