Originally Posted by MaineF250
I then bought 8 cans of Fluid film and sprayed every hole/crack/crevice I could find...........and I keep the underneath washed at least once a week.
In Canada a can of Fluid Film cost $14.99 at our Canadian Tire
It would cost me $119.92 for the 8 cans that you used. For that cost I can have my entire car sprayed professionally at Krown (and others).
I think Fluid Film is a great product and I am using it to protect my steel winter rims. I have no doubt that it will protect the areas you sprayed just as well as the commercial product. However I don't think it can treat inner door panels, fenders, etc, like the professional product does, because the pro product is sprayed like a fog from a long extension wand as it is inserted deep into the hidden areas. Literally every square inch is contacted by the oil droplets. As I have said before, I could pour a litre of oil through a hole drilled in the edge of a door, and have it drip out the bottom over the next few days, but that does not mean the entire inner door is protected.
I have been getting my vehicles oil sprayed for over 30 years, and I make it a rule to never wash them during the winter. I feel that rinsing the underside of a vehicle with a high pressure nozzle is just washing away all that oil you paid so much to have sprayed on. Rust will never form on a painted surface unless the paint has been compromised by a scratch or stone chip. A good sealant or wax applied in the fall will protect those bare metal areas. Following this technique I have never experienced visible rust on any of my vehicles.