Applying Rust Killer to under carriage /frame any reason not to ?

I have used a product called "Ospho" to amazing success on my vintage Ford projects. Heavy duty gloves, stainless steel brush pads, eye protect and elbow grease.

Knocked all heavy stuff off and used Ospho to get a '32 frame to beautiful bare metal. The say you can paint directly over it but I'm not sure. The Rustoleum I applied over it is sticking quite well.

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Sorry, can't find any pictures of the process but it works great!


I've also had luck with a product called "Evapo-Rust" though the way it works it's better as a 'dip' and not a treatment.

Good luck!! smokin.gif