The Rusfre truck bedliner kit comes in two sizes; one for a short bed (6.5′) and one for a long bed (8′). Each kit contains a Part A and Part B that will be mixed together and then sprayed with the included gun. The Part A comes in several canisters so that you can mix up and spray a small amount at a time, allowing you to work at your own pace, and not have to worry about wasting product. Simply mix the two parts, based on the included instructions, screw the spray gun to the canister, hook up an air line and spray. Here’s a video of us using the small kit on our 1953 Chevy truck bed. We cut 1x pine boards and sprayed the bedliner directly to them. We also sprayed over top of the Zero Rust paint that we sprayed on the inside of the bed.