Last time I did a job like that I had a lot of trouble. There were about 5 door, full coverage. Getting the right amount of application fluid was the challenge. If I used too little I got a lot of bubbles in the film. If I used too much I had a hard time getting the mask off without lifting the etchmark. I don't take those jobs anymore. I believe I was using Avery etchmark, but not exactly sure of the brand.