[Spot welding Alu - reasonably do-able.]

It would be very interesting to hear if this will work with LR alloy as this is going to help restorers?

I've used that technique on both vintage LR brimabright and whatever the modern LR alloy is.

I use a standard light duty 2.5kVA Miller unit and would probably work with a 1.5kVA model, by increasing the time.

Couple of tricks: try it on scraps first, so you don't end up with holes or ultra brittle points which will break at the first bit of stress. A small drop of clean oil on the spot welder tips will reduce the amount the insulators stick to the tongs/prongs of the spot welder. Try stainless steel between the tongs/prongs and the brimabright. Don't forget to document the settings for next time.