Matt Barre wrote:
>
> Roger,
> I have not tried it myself but was let in on a "secret" used by an
> upholsterer. He claimed that by rewetting a warped panel with an
> ammonia + water solution and holding it flat while it dried the warp
> could be eliminated.
>
> I have just cut new ones out of hardboard in the past but have been
> thinking that a better substrate should be available. I have heard of very
>thin plywood being used but would like to find an appropriate
> thickness/rigidty sheet plastic.
>
> Let us know if you try the ammonia and water.
>
> Matt Barre
*********************
Matt:
The ammonia water trick does work. This is an old method also used by
radio-controlled model builders (of which I am one) to wet balsa wood
for making curved leading edge surfaces and other compound curvatures.
Martin Libhart
1970 Spitfire Mk.3
FDU 75026 L
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