Sounds like you got a decent carbine. I personally would not use Acetone on it. I prefer a milder dry-clean solvent. Even regular Mineral Spirits will clean it fine. Then oil all metal surfaces, inside and out. For the stock, get you some good Nitrile gloves and wash the stock/handguard in lacquer thinner. It probably will come out a lot lighter in color, and you can then steam out the dents. After all that you can start the oiling process using raw linseed oilicon, flax oil or boiled linseed oilicon. The processes are different depending on what you use. Raw Linseed oil is applied sparingly over many treatments and soaks in. Boiled Linseed Oil is more like a varnish. Raw Linseed oil is what the military used. With either one, if you cut it 1:1 with Turpentine or Mineral Spirits, it will speed absorption.