Signing in to follow this one. I cant be of much help on the welder front either as we have a 110 and 220V miiller mig at work I can steal for a weekend when I need to weld something on mine...
careful with coating it...that stuff is a mess if you have to remove it later. We spent HOURS carefully patching the rust inside the tub and priming before spraying my bedliner down... It was a TON of work but I plan on keeping my rig for at least 30yrs so I dont want to deal with it again any time soon.Ive read some decent reviews on the HF welders... Nothing special, but it seems like it would get the job done, especially since they are smaller holes... Plus the whole inside and underside is getting coated and lined, so it doesnt have to be pretty.