Debate over to spray or not to spray is an easy one, spray and it's gonna last a whole bunch longer, don't and suffer the consequences of body rust plus brake and fuel lines failing long before their time. So you drove down to the local "guy" that everyone goes to because everyone "knows" he does a fantastic job, well based on the rides we get in that have just been done, that "guy" doesn't give a rats behind about you or your car. We are seeing freshly done car after car again this fall where they've done only the areas you can see kneeling down and looking under your car. Yup, looks fresh and oily and makes you feel good about having it done but in reality they've done next to nothing to prevent the damage your trying to prevent. Tell them up front, before you leave you wish to see it on the rack and check it out for yourself, might get a drip or two on you if your using Krown or Rustcheck, with Corrosion Free once they stop spraying you won't get dripped on. Be sure they pulled the body / rocker panel plugs, be sure they sprayed inside the hood and fenders. Shitty deal we have to check but unless you do far too many just aren't doing a proper job.