I agree on the expanding foam. For a while, a similar foam was actually
officially offered as a cavity treatment. But it was found out that the
foam came "unstuck" from the metal and created a tiny space between the
foam and the metal. A tiny space like this actually sucks in moisture by
the hydroscopic effect and thus promotes rust.
For the header rail, you could spray some glue in there, or maybe just
straight Waxoyl would be enough to keep the rivets from rolling around.
Ulix
On Mon, 18 Jan 1999, Mike Gigante wrote:
> Be *very* careful. That stuff is a recipe for hyperactive rust.
>
> It is pourous and holds water a long time. I *think* it is also activated by
> an acid so that wouldn't help either.
>
> I have seen a sprite that an owner filled all the cavities with that
> expanding
> polyurethane foam, and it basically fell apart after 2 years. It was in very
> good condition prior to that.
>
> I looked at the shell after it was hot tanked and (phosphoric) acid dipped.
> Neither of those two processes affected the foam, but the foam had taken
> care of most of the metal around it so that it wasn't *too* bad to get it
> out.
>
> The shell was a throw-away.
>
> I realise we are only talking here about the hood attachment, but I'd still
> avoid the stuff unless you took great precautions before hand. I'm guessing
> that liberal use of Waxoyl injected in beforehand might help.
>
> Mike
>
> Mike
>
> -----Original Message-----
> From: Alan Fisher <hello39@idt.net>
> To: Mark Endicott <endicott@nashville.com>
> Cc: spridgets@autox.team.net <spridgets@autox.team.net>
> Date: Monday, 18 January 1999 13:36
> Subject: Re: Hood Header Rail?
>
>
> >Mark Endicott wrote:
> >>
> >> Today I removed the old hood (top) that is in need of replacing. All
> >> of the parts look fine except that my question regarding the
> >> originality of my top have been answered. I don't know how many have
> >> been on this car but the header rail is full of pop rivet parts and
> >> pieces. It sounds like a baby rattle when I shake it. It looks like
> >> I may have to live with the pieces as they will not shake out through
> >> the other holes. I am considering using a hole saw to cut a 3/4 hole
> >> somewhere in the rail to get this crap out. Any other suggestions
> >> before I cut away?
> >> --
> >> Mark
> >> 1970 Midget
> >> Nashville, Tennessee
> >>
> >> http://members.home.net/mendicott/midget.html
> >Mark,
> >I remember an old tech tip.
> >Buy a can of that insulation that has a spray tip. Squirt it into the
> >hole with the applicator tip and then let it expand inside and capture
> >those little rivet scraps as it hardens. You will only need a little bit
> >as most of that stuff expands like crazy.
> >Alan
> >
>
Ulix __/__,__ ___/__|\__
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'67 Sprite '74 X1/9
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