My buddy just got a No 4 Enfield and it is packed with cosmoline. What is the best way to remove it safely with out harming the wood finish? Thank you!

Wipe the wood off as best as you can.The rest will bleed out with use.If you cant wait or do not want to deal with the cosmo weeping out then wipe her down with denatured alcohol.The denatured alcohol can remove some oil finishes though.You may have to put a coat or two of Tung or linseed oil on the wood afterwards since the alcohol may dry the wood out.
Personally I just wipe what cosmo off the wood that I can and deal with whatever weeps out when the rifle gets hot from firing and the sun.
Raymond

if you wrap the stock (just the stock) in rags, seal it in a plastic trash bag and then leave it in the trunk of your car for a few days, the heat of summer (i would do it soon since it will be getting cooler out) should make the cosmoline seep out onto the rags. for a more colder climate, i would do the same thing minus the plastic garbage bag and then place it in the oven on its lowest setting (warm - should not be hotter than 180-200 degrees) for a an hour or so.  
mp