He borrowed an inert gas welder last night and was shown how to use in briefly. He's out there now, patching the holes in his 'show' beetle, ready for the MOT.
Welding isn't totally easy (I've done some myself) but he seems to have picked up the technique at least useably, if not with much neatness *yet*. Some people can't weld at all.
It's pleasing to see skills developing.