I can recommend Mikes advice Colin. Sandwich the ally between two plates, secured by any means and you will get no warpage. I did this tool box lid for the Walker Bulldog resto project that Weapsim did for the Cairns tank museum.
i couldn't get enough pressure at 100 tons in one go so had to step it along.
Still came out neatly.
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1943 Willys MB
Willys Trailer
1941 Fordson WOT 2H
1941 Fordson WOT 2H (Unrestored)
194? Fordson WOT 2D (Unrestored)
1939 Ford 1 ton utility (Undergoing restoration)
1940 Ford 1 ton utility (Unrestored)
1941 Ford 1 ton utility (Unrestored)
BSA folding bicycle
BSA folding bicycle
1941 Ford/Marmon Herrington 3A gun tractor
1941 Ford/Marmon Herrington 3 gun tractor (Unrestored)
1941 Diamond T 969 (Unrestored)
Wiles Junior Cooker x 2
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