If you've ever used a scrollsaw to cut intricate pieces from stock 1⁄8 " or thinner, you've probably noticed that it's hard to negotiate sharp curves and still stay on the line. It's also tough to get a clean cut.
It's easier to make tight cuts in stock at least 1⁄2 " thick because the blade cuts less aggressively, giving you better control. Also, it's easier to control the stock with your fingers. So, tape several pieces of thin material together and stack-cut them. Need only one? Tape the thin stock to a scrap of 1⁄2 " knot-free softwood.
—From the WOOD magazine shop