@KoiwiGal - You can make all kinds of things with sheets of metal, particularly very thin sheets which can be quite malleable. Although, of course, you have to bear in mind that they will continue to be malleable after you've finished crafting them.
I also use some cold working techniques, although I make decorative objects like picture frames and so forth. I also do use a bit of welding as well as the cold metal processes. I find that there are some things I can't do properly without welding, although that's just my way of doing my craft.