Does it have a grenade launcher on the end, and grenade sights? Does it have a valve so that you can shut off the gas and turn it into a bolt action? If so, it is a Yugoslavian SKS.
If it turns out to be a Yugo, and if you wish to strip it, I would do in this order:
1. Get rid of every bit of cosmoline that you can find. I would clean metal, gun, take the stock off, clean it as best you can, then wrap it up in aluminum foil, place this into a black garbage bag, and sit it on the dashboard of a car in the warmest area you can find. This usually sweats a lot of the cosmoline out. Every couple of hours go out there, wipe off the cosmoline, then clean it very well with an orange or green cleaner, then put it back again for another couple of hours. Keep doing this until there is little or no cosmoline to be found.
2. Let it dry well for a couple of days, then get some paint stripper, strip the finish off (make sure and use rubber gloves, that stuff is nasty!) and use 0000 steel wool to get the finish off. Then wash it off with water and more green or orange stuff, let it sit and dry for 3-4 days, then you are ready to sand.
3. Sand it will, starting with ~200 grit, then progressing until you get to ~600 grit sandpaper.
4. To get a preview of what it might look like, after sanding, blow off or clean off all the dust, get some alcohol, and wipe it on to the stock. You can readily see any scratches that need to be sanded with finer paper, or any other small defects that you may not be able to see until AFTER you have dyed, stained, or finished it.
5. Once you have sanded it to your satisfaction, purchase an aniline dye of the color that you would like to use for your gun. Follow the instructions, making sure to mix the dye, testing a small region, then dye the rifle the color you would like. You will probably have to use at least 2 coats to get a uniform color.
6. Next I would use ~6 coats of Tung Oil. Please follow instructions, and allow each coat of Tung oil to dry for at least 24 hours before applying the next coat.
7. Finally, I like to finish by waxing the stock with Minwax paste wax and 000 steel wool. This protects the wood and really brings out the grain.
Hope this helps!