I weld on the Anapolis, Md. harbormaster's boats alot they're all bare alum in salt water, trouble starts when you paint alum improperly and corrosion starts between the paint ant the alum. I build alot of sailboat masts, if you put a dab of silicone on the threads you can still get them out 20 yrs. later, like to have a dollar for every snapped off ss fastener I had to weld a blob of metal onto and twist out with vise grips, I'd be rich and wouldn't have to build my own system, but prob. would anyhow. JKB- you don't have the place or power? I have a miller 300 sychrowave at work and a little 200 amp Miller dynasty I take out on the dock and get to bring home with me, great little machine for light gauge stuff (alum) or pretty much handle anything DC tig wise. Good luck finding something.
Charlie
