The finish on that stock is actualy out of a spray can from Wal-Mart as bad as I hate to say it. I think its called Poly-Crylic or somthing and its a semi-gloss.
I sanded the stock ,after I did all my cutting and shapping , down to 280grit paper then I sealed it with Gorilla glue buy using very little and just rubbing it in by hand after it set up I sanded with 280 again then 400 wet a couple times , wiped it all down with some denatured alcohol and sprayed it. Its got about 10 coats on it (2 cans) and it was sanded with 400 wet between each coat. I let it dry for 3 days in a warming cabnit before sanding and adding another coat.
This stuff isin't that hard when its cured and I may end up putting several more coats later just to build it up.
Si Vis Pacem Parabellum