Finish on components on WWI 3 inch Stokes mortar bomb

[peregrinvs]

I’ve just purchased this fully strippable 3” Stokes bomb to restore. I know the HE body was painted dirty white, but were the other components left in bare metal, or given some sort of finish such as shellac?

Thanks.

 

[Snufkin]

The pistol and cartridge holder, and the top and bottom plates, were usually finished with a rustproofing by Fermangan treatment or shellacing.