Oh ! That is a difficult one !
The " fusils règlementaire " ( ordonnance gun ?)for the land army ,
starting from 1717 model , are to be made according to a royal ordonnance ,wich is a complete description of the gun .
The " fusils pré-règlementaires " ( army pre-ordonnance guns ? ) before 1717 ,
the guns for the " compagnies franches de marine " ( marines ? ), navy guns and the " fusil de chasse et de service "
( guns for hunting and service ) are to be made
according to contracts ( contract of 1738 etc )
that described the gun the same way .
I never had a complete archive in hand , only
parts of them , from different books and magazine article ...
Anyway , I never saw a description of the
finish applied on the wood of french guns ,
I wonder if there was any ?
My un-educated guess is that the finish
from the factory was one or two coats of oil ,
possibly walnut oil . The gun owner was to take care of the wood as wel as of the metal , adding
another coat of oil once in a while .
Today it would sound ridiculous to pay over
1 000 $ for a gun without any finish either on the
wood or metal ,but with weird screw threads ,
under the vague hope to be totally PC .
Kit Ravenshear once mentioned that
fact in one of his booklets .