The grease on the bayonet and scabbard should be the same. you could try whatever method you use on those first. Two tries possible prior to hitting the metal of the rifle.

Whatever you use you do not want to use anything that will attack suncorite.

The wood should still have the original layer of linseed oilicon under the hot grease dip. Whatever method used you do not want to dry out the stock or stain it.

off topic:

As per our discussion on "the grey blanket" there is a interesting thread on that topic over on the Jap page on Gunboards.