Michael,
I want to add my view here.
The activity of chemical strippers is roughly governed by the same
physical laws as chemical reactions, so Arrhenius temperature
dependency is the primary governing principal. This principal states
that for every increase of temperature of 10 degrees C, the reaction
rate doubles. Since your garage is about -7 degrees and most chemical
reactions are standardized to 25 degrees C, the difference is roughly
30 degrees C. Thus the stripper would need to be applied for a period
of time equal to or greater than 2 to the 3rd power (2 from the rate
doubling,
or in this case halving, and 3 for the 3 decades of temperature
decrease).
One advantage of doing this in the winter is the reduced volatility of
the
stripper, so it is slightly more effective and less toxic than in the
summer.
This discussion does not take into account any goofy phase transitions
that may occur, but the rules governing these phenomena are still poorly
understood.
Scott 67 TR4A
On Thu, 07 Dec 2000 20:47:51 -0500 "Michael Ferguson" <fergie@ntplx.net>
writes:
>
> Thanks to everyone who replied to my question about paint stripping.
> I think
> I thanked you all individually, but if I missed anyone, my
> apologies.
>
> Most folks seem to recommend chem strippers, but it doesn't sound
> like
> they're going to work too well in 0-20 above temps! I thought this
> was a
> WINTER project!!! Can't do it indoors - even if the garage was
> heated - cuz
> I'll die from the fumes. Can't do it outdoors cuz the stripper won't
> work in
> cold weather!
>
> Just tried an experiment though...cranked up my propane torch and
> used a
> scraper on a junk bonnet from a parts car, then got rid of the
> little bit of
> stubborn primer (wouldn't scrape off) with a very small random orbit
> sander.
> Actually not too bad - either in time spent or labor! Wonder if I'll
> warp
> the panels with the heat from a propane torch, keeping in mind that
> the
> panel started out at 20 degrees (It's COLD here!). It's quiet, the
> torch and
> the scraping kept me warm, and I don't have any gouges or scratches
> in the
> bare metal. Am I nuts, or does this idea have possibilities? Or
> both?! (Am I
> a great straight man, or what?!)
>
> Thanks again everyone!
>
> Michael Ferguson
> 1959 TR3A TS53990L...O
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