06-09-2006, 10:20 PM
RustyRust (with My Name, I'm a Natural!)
The Prep-Step primer sounds like a phosphoric acid base...of course all the market-babble makes it hard to tell...one would think the process is rocket science.
Anyway, it appears that Rust-Step is merely a very good paint, but any rust painted over would still be, well, rust. But if it works, so much the better.
Rusty
"StaRV II"'94 28' Breakaway: MilSpec AMG 6.5L TD 230HP
Nelson and Chester, not-spoiled Golden Retrievers
Sometimes I think we're alone in the universe, and sometimes I think we're not.
In either case the idea is quite staggering. - Arthur C. Clarke
It was a woman who drove me to drink, and I've been searching thirty years to find her and thank her - W. C. Fields
06-10-2006, 12:42 AM
bill hYeah, I would have preferred to do a phosphoric acid thing, too. I agree with you totally on some sort of acid pickling or passivating before paint. But expediency ruled today. My rusted Kwikee has been offending me, and my wife got involved. I guess their claim is that their paint is so good that rust doesn't have a chance. Sounds a little like POR15.

However, that being the case, why do they sell the Prep Step, which is probably phosphoric acid?
We used to use a thing called Skin Britener to etch aluminum before painting, which smelled like phosphoric acid. We also found it to work well on steel parts.
06-10-2006, 02:26 AM
Bill GI have been using Rust Bullet for a year now on some badly rusted areas. There is no sign of the rust returning at this point. I can't imaging that it will never begin to fail, but so far it is hanging in on areas that see a fair amount of moisture. Like my steps and battery shelf in the engine compartment.
Bill G