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Old 05-28-2018, 08:51 AM   #1
Bob Gardner
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Join Date: Jan 2006
Location: The North of England
Posts: 1,812
Default Shellac

Whilst researching Renzo's German CV propeller in the Handbook on Propeller Construction published by the British Ministry of Munitions (AB275/3936) dating from late 1917 I came across this sentence:

The use of "French Polish" or any other form of shellac is forbidden.

I have read elsewhere that shellac was used by the British as a 'size' to fill grain on internal parts of aircraft such as ribs, formers and stringers which was then coated with a waterproof varnish.

With kind regards,

Bob Gardner
Author; WW1 British Propellers, WWI German Propellers
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