My recently acquired FWB 300s was a fine shooter as it arrived, but the stock was a mess of scratches and deep dents, and there was rust and bare metal everywhere. I spent several days steaming dents, removing rust, and applying cold blue and aluminum black, and here’s the result.
While I did some removal of metal scratches, I didn’t draw file out one large dent in the barrel sleeve. Maybe later.
Postscript: Despite how much I liked this rifle, it too eventually found a new home. The problem was one of fit: I either had to raise the sights, or lower the cheekpiece to get a good head position, but the stock is non-adjustable, and you can’t fit a riser block under the front sight of the 300S (you can under other 300 models). The only other options were seriously modifying the stock or fitting a scope. I didn’t want to butcher a stock that can’t easily be replaced, and I bought this gun specifically to shoot with iron sights, so off it went.