what fights rust?

[tberk at sbcglobal.net (T Berk)]

> Nothing really kills rust except complete removal. I use a sand blaster and gringer to get rid of all the rust. Then replace and missing metal with a welder.
> prime with acid based primer and enamel top coat.
> 
> Others swear by POR 15. Rustoleum? Just plain s**ks.
> Good luck!
> 
> Julie Macfarlane 


I am afraid of acid based primer, although I was about to recommend a 
self etching primer. I _think_ the etching is done from the other end 
of the pH scale; via phosphates.

(Damn, hold on while I go refresh my elemental chemistry knowledge...)

Well looks like the Phosphate stuff is a type of Acid as well, so 
thats what I know.

paste this following line into Google.com:

self etching primer phosphate -dental -calcium -dentistry

Key to these possesses is to remove most all the rust away, leaving 
perhaps just a stain but no real red rust. The etching reacts with it 
to convert the iron oxide (oxygen) to an iron phosphate (more inert).

Sealing out future air and moisture is important.

In your case, if you actually have  hole I would think to do the cut 
and graft then prep n' paint like it was recommended.

Found a link about Rust Prevention and Repair:
<http://www.metalwebnews.com/howto/rust/rust.html>


TBerk