So i make a homemade waxoil solution for spraying on the underside of vehicles just like fluid film or krown ect. I am looking for something to add to the solution that acts as a rust converter/neutralizer. Most things i see are water based and water and oil certainly dont mix and i dont want water getting trapped under the waxoil. Im looking for something mild and that will completely blend into the oil and not separate out. It can be liquid or powder as long as it completely mixes. The cheaper the better. Im not looking for something thats $50 a quart or something ridiculous. Thanks