I used the dura-coat on a pistol that was very rusted, it came out pretty good for my first try at this stuff. Tips, don't put it on too thick, make sure your prep work includes some way of roughing up the surfaces so it will adhere well(sand blasting), follow the directions on applying the hardener to the letter.Mask all surfaces that are dimension critical for the weapon to function(I had some problems getting the pistol to go into battery that was caused by build up of the dura coat).Make sure the drying time is sufficient.
But you will be surprised when you're done it will lok a whole lot better and that stock you mentioned looks real great with the 10-22!