Prep on the paint is not too bad, the body work is what takes some knowledge... On the compressor the important thing is to have a compressor that can hold a decent pressure without fluctuating, and make sure all your lines are dry. Prep all depends on the condition of the body (dents) and then the condition of the paint. If you have any questions while your in the process feel free to ask me. I worked at my dads paint and body shop and have experience with almost everything, Just get at me if you need any help.. I am actually in the middle of painting my z as well. I will be sealing and priming everything I just didn't have time before this semester started. Here's a pic, and the doors are ready to come off. I will be shaving the rock guard and priming the ttop areas.