I've not had a particular problem stripping finishes with a paste stripper from the hardware counter unless it is the type like Remington uses. Their finish is epoxy and requires heat (like in a heat/paint stripper gun) to loosen up the finish. As for steaming out the dents, I would use a wet washcloth and a steam iron/ soldering iron. Place the wet cloth over the dent and hold the steam iron on the cloth till the steam stops rising. You must remove the finish before trying to steam out the depressions. Scratches are difficult if they have cut through the grain of the wood.......but it won't hurt trying. Usually, scratches and deep depressions can only be fixed by filling with sanding dust form the stock mixed with the new finish.
Jim