Tartan basically uses the same technique I use. I usually lay mine on the floor. I lay the back down, pin it right to the carpet and pad, then lay the batting down. I roll or fold the batting up halfway, start spraying in the middle and ONLY the middle, then carefully pull the batting taut over the sprayed area and lay it down flat. Press it with my hands so it sticks, then pull the batting back to where I stopped spraying and spray a new area. Shower, rinse, repeat.