Fluid fluid is excellent. I use it under my old BMW and spayed my OB shortly after my purchase. Still covering 4 years later in a moderate low salt environment. You can buy it from Lowes. BTW, a spray nozzle extender is available from Fluid Film. Highly recommended..What about using Fluid Film? I was thinking about tagging the bolts and stuff from the undercarriage with it regularly.
I have never paid to have rustproofing applied. I have all the equipment needed and do it myself, to all our vehicle. Doing it myself allows me to take the time a shop could not take, and therefore I'm able to ensure the job is right. I remove all the finder liners and body plugs and spray all cavities.Sure, have the dealer do it for a small fee and while you’re there ask about ScothGuard for your seats 😂