Frame under carriage paint

[GSP7]

Ive been painting my axles and frame, etc with Rustoleum semi gloss black.

I have used it for years on other undercarriage and engine compartment parts also and it holds up and lasts great. I can scrub with detergent an old greasy dirty axle that i had painted with Rustoleum semi gloss years ago and it still looks great

Some Rusty parts I use phosphoric acid on before I paint

Ive seen alot of guys useing this POR 15 and Zero Rust etc,, I wondered what was so great about POR 15 and what is in it and what kind of paint is it.

So I was doing some research and found this.

Good read if your interested

http://www.autobodystore.com/forum/s...eum-type-paint