Re: Metal- Go to the grocery- in Housewares, find a COPPER Chore-boy pot scrubber. Do not get th cheaper copper plated steel. Remove action for stock, removed bolt from action. Wet with light oil, wrap it up (platic bag) let sit for a day. Wet chore-boy with more oil, rub lightly. Gun will take on a coppery hue. Wet with more oil, rub with clean cotton cloth. Coppery color will come off. Will remove dried oil, greease, light rust without hurting metal finish.
You CAN use gasoline, naptha, white spirit, Coleman lantern fluid- VERY flammable, we will NOT come visit you in burn ward at hospital.
Re: Wood. Finish sound like it is dead. DO NOT SAND IT. Get some Forby's Refinisher (Lowes, Home Depot, Menards) be careful, is very flammable. Follow directions, use in well ventilated area (outdoors)
What we have here is... failure- to communicate.