It's actually my first time wrapping anything. I had a friend teach me some basics of it before I got started. It's quite frustrating and tedious work. What I've learned is to make sure the body and edges are de-greased, clean, and smooth. I washed the car with dawn dish soap to de-grease and clay barred it to get the body smooth. I had some small bits of surface rust showing at some places so I even had to grind it off, primer it, and wet sand that spot too. Practically if your body is still good, a clay bar job will do it. Rough spots will show if you don't get it smooth and the vinyl may not adhere/stick to the panel well. The vinyl will lay over small dings as you saw on my hood, but as you can also tell, it will stand out too just as it did before the wrap. Overall, what I'm trying to say that are most important to the prep work is get the body smooth and constantly cleaning it free of contaminants. Hope that helps some if you're planning to wrap as well.