Fred hit it when he said they're types of iron on covering. They are film type plastic with the color in the adhesive on one side. If you are going to use either be sure you have the adhesive side on the wood. I would like to have a couple of bucks for each time I have forgotten to remove the clear backing before trying to iron on. That is the first step after you have determined what size piece to use. There are other types of covering which are basically fabric. Coverall, Solartex and Coverite come to mind. They also have adhesive on one side and can be ironed on. The drawback is that they are heavier than Monokote or most other film coverings. Also, being fabric, they have a weave pattern that should be filled with dope or primer before you try to paint. The fabrics also come in colors if you don't want to paint. I usually use fabric types for larger or scale type applications such as WWI aircraft. You can use the antique style and clear dope it or paint it for that type application. Film type coverings are usually very difficult to paint but it can be done. The best way to add color to film is more film on top of the original cover. The wrapper will suggest the degree of heat you should use to apply the material.