That looks like an older B&C stock. Never tried webbing a stock, but I've done it on other objects. Just dipped the brush, back off a bit and sling the paint at what you want to paint. I practiced on an old piece of plywood to get the technique down. It is easy to over do it.
Camo seems the easiest to paint. Even if you mess up you can always say you planned it that way. I've done a few that worked out well. After the base color I used plastic leaves from walmart for a template for the camo patterns.
Overall I'd still say it turned out pretty well. The good thing about synthetics is that it is easy to redo one if you don't like the results.