I work at Carquest and we are suppose to be able to order it. I would say a gallon would go pretty far, are you doing everything or just the frame and undercarriage?

 

Best way and free when changing oil. Oil resist water which prohibits contacts.

 

I would just do the undercarriage and frame if I did happen to get it. How much does a gallon run? Could I just paint it on without removing the frame, ect? I'm a perfectionist and minor things bother the **** out of me. I don't have any carquests around where I live, but if worse comes to worse I could always order it online. It may be awhile before I do it, I am currently unemployed. I got some paint that is supposed to cover rust and stop it from coming back, but I have no idea if that will actually stop the rust.

 

Online would be your cheapest, and its its like 120ish for 5 quarts. It all depends on your version of perfection. Id spray your axle with rustoleum black, and if your looking for a cheap undercoating that hardens up real good go buy the cheap spray on bed liner. Ive done 2 or 3 rusted out hitches like this and ive never seen em rust again.