The sheet metal can be cut correctly with a saw, provided, that its thickness is not less than the distance between the teeth of the saw blade. When it's thinner, simple cutting is not an option, and we usually cut thin sheets. You can, of course, cut with scissors of various types, but that is also not always beneficial. With an ordinary hacksaw, you can easily cut sheets between two hardwood washers mounted in the jaws of a table vise.
