If you're only looking to make small decals (8" x 10" or smaller), you can use waterslide decal paper and an inkjet or laser printer. Waterslide decal paper comes in both clear and white background (no printer made for home use can print the color white). If using an inkjet printer, coat the waterslide paper with clear before activating the paper...laser ink won't dissolve in water. You can see some gauge decals I made at the top of the "Interiors" section. Color laser printing is best done at a Fed Ex/Kinko's and is not expensive. If using these where they'll be exposed to sun, etc be sure to overcoat them with clear.
