Stock was sanded and had a varnish put over it. By the whitish areas, do you mean on the stock? Those are probably scuffs and scratches that occurred after someone redid the rifle.
You can see the “varnish” that was applied and then dried over the recoil lug on the left side, indicating refinish. Ditto on the inlet for the sling keeper.
Phosphate finished guns are desirable, but the stock condition hurts it’s value...IMO