For the fuselage and engines, use a pencil or dowel to "pre-roll" the paper into a cylinder shape. This prevents unsightly creases.
You can scale the design to any size or even repaint the "skin" digitally before printing. f14 papercraft link
If you are building a model with functional sweep-wings, ensure the pivot point (usually a toothpick or paper rolled into a tube) is reinforced with extra glue or a bit of tape to handle the movement. Conclusion For the fuselage and engines, use a pencil