Obviously! If you are painting them, apply your masking tape, then draw your curves (with a compass or a circle template...) out on the making tape first. When you're happy with them, cut the tape stripe off from the cab, If you are worried about the needle at the other end of a compass, tape a flat scrap plastic piece over the surface then you can put the needle end on it without sratching the rest of the painted surfaces. My 2 cents.