George P. Richardson wrote:
>
> Oh, I got rid of the rust. It can trap moisture and oxygen in it's pores
> that make problems for the paint, which can in turn allow addtional oxygen
> in for further rust. On my Chevy, I've just brushed off the rust and used a
> good helping of touch up paint to cover it. After 4 years, no addtional rust
> has formed. Why? Because although the rust is still there, it has no
> external source of oxygen.
Not a bad idea for touch-ups, but IMHO not for complete repaint jobs.
>
> The bulging in the paint is caused by rust forming (or continuing to form)
> from trapped oxygen, or by trapped moisture heating and cooling. If the
> paint bubble doesn't burst, eventually rusting stops as the trapped oxygen
> is used up. Rust *must* have an external source of oxygen and can't use the
> oxygen bound up in existing rust (iron oxide).
>
The bubbles "ARE" the point. No rust means no bubbles to burst or
crack. I think you see my point.
Jor
> George Richardson
> '57 TR3, TS15559L
> (getting ready to paint - and now on the web!)
> http://www.merlingroupinc.com/tr3.htm
> -----Original Message-----
> From: Joe Curry <spitlist@gte.net>
> To: George P. Richardson <gprtech@frontiernet.net>
> Cc: Triumphs Mail List <triumphs@autox.team.net>
> Date: Friday, February 13, 1998 12:53 AM
> Subject: Re: [Fwd: Rust elimination]
>
> >George,
> >If you did not get rid of the rust on your valuable TR3, and expect that
> >painting over it will seal it and thus prevent further rusting, I pray
> >you are correct. However, I have seen too many little bulges coming
> >from ill prepared cars to think you are right about that.
> >
> >If It were me restoring a "3", I'd make sure that I erred on the side of
> >safety, meaning that if there was ant possibility that the covered rust
> >theory is incorrect, I'd certainly get rid of the rust.
> >
> >I'm sure you don't intend to do that again soon.
> >
> >Too much Time, Too much work, Too much money not to do it right.
> >
> >Joe Curry
> >
> >George P. Richardson wrote:
> >>
> >> Rust contains oxygen, but the iron does not. Isolate iron from oxygen
> and
> >> it can't rust.
> >> Even if you cover rusty metal with paint, once the oxygen trapped below
> the
> >> paint is converted to iron oxide, rusting will cease.
> >>
> >> The rusting occurs when the coating is not keeping out oxygen, such as
> when
> >> the paint is scratched or peeling. In the case of frame members, these
> are
> >> often not painted inside, and so rust starts inside.
> >>
> >> George Richardson
> >> '57 TR3, TS15559L
> >> (getting ready to paint - and now on the web!)
> >> http://www.merlingroupinc.com/tr3.htm
> >> -----Original Message-----
> >> From: Joe Curry <spitlist@gte.net>
> >> To: Triumphs Mail List <triumphs@autox.team.net>
> >> Date: Thursday, February 12, 1998 10:49 PM
> >> Subject: [Fwd: Rust elimination]
> >>
> >> >--
> >> >"Thanks to the Interstate Highway System, it is now possible
> >> > to travel across the country coast to coast without seeing
> >> > anything." -- Charles Kuralt
> >
> >--
> >"Thanks to the Interstate Highway System, it is now possible
> > to travel across the country coast to coast without seeing
> > anything." -- Charles Kuralt
> >
--
"Thanks to the Interstate Highway System, it is now possible
to travel across the country coast to coast without seeing
anything." -- Charles Kuralt
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