Hello- Just bought a 2004 Rav4 for my daughters first car.....Car looks great and drives great. My only concern is that up until 2012 it spent its life in Michigan before making its way to Texas. Under the car has a fair amount of rust on it. I'm hoping there is something I can just spray all over the underside that will convert the rust and significantly slow down the rusting process. I know about POR 15 but there seems to be alot of surface prep involved and it needs to be brushed on. Is there a product I can spray on for better/easier coverage that is also effective?