welcome..the Forum team is great!.Got help a lot!!!
Did go through a full restauration of 4907. NOT as cumbersum chasis wise as yours, but still very expensive.
I live in Stuttgart so close by. Happy to come by and chat..

Have a nice French friend "Pascal" who lives close to Saarbrücken/Bitsch (so a bit north) in France. We did buy vintage cars in the US. He did the Chemical approache on his E-Type Series 1 and I did go with the classical special grease wax approache. Well mine was not as work intensive as yours probably.
Send me a Personal Message will get you my dear French friend details & experience.
Matthias