Hey up, I'm building a very fancy animal hutch and plan on fitting a stainless sheet metal roof. Most of the stainless sheet will be folded profile, similar to the fancy roofs you see on grnad designs made from sheets of zinc. Where the folded sheets meet on the edges and at the front, I'd like to have the stainless TIG welded together for neatness and for durability. Downside it that the steel will be folded around a heavy ply sheet. Is it possible to weld the 0.5mm stainless steel without setting fire to the ply beneath? It doesnt matter that the ply will get burnt a little during the process, but the steel needs to be welded neatly. Due to the shape, theres no way the steel can be welded andthen the wood fitted at a later stage, the welding has to be done with the ply in situ. Thoughts? Can it be done?