Cutting styrene is a real challenge. I haven't found a supply of .010 styrene in large sheets. I have cut .015 styrene, which has a soft side and a little-less-soft side. With .020 styrene there seems to be many choices, often not explained by suppliers. There's very hard polished front versus soft back, hard smooth front versus medium back, medium hard front versus soft back, etc. And .020 styrene ranges from .020 to .022 thick.
Each of these combos and thicknesses has a different cutting profile. The harder the styrene, the more pressure is needed to cut it. And the slower the speed. The cutting drag varies from heavy to extremely heavy, making long cuts hard to repeat. And different blades make a huge difference in what you can cut.
With some comstructions I've laminated .010 styrene with .005 clear acetate to form a nice cabin side. The inner and outer layers of styrene have different window sizes, resulting in a layered effect. On the curved surfaces of a pilot house, I have to allow for the different circumferences of the inner, middle, and outer layers.