WARNING - WARNING
We called Phoenix prior to using the chassis saver on our step. The step is bolted on, then the plywood is laid, then the vinyl flooring. There would be no way to access the bolt heads and keep the bolts from spinning thus never being able to tighten the bolts again. That is why we did not remove the step.
Also, do not get the chassis saver on any moving parts because it does bond metal to metal!
A quart does go along way. It has the consistency of water but does set up quickly once exposed to air.
PS-Our rust is probably from our many trips to Florida in the winter as well but it's a small price to pay. I'll take rust over snow any time.