As promised, here is my finished gun including some process pictures (final results at the bottom).
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Before:



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What I used for the staining: Acrylic Black & Red (ratio of 2 reds : 3 blacks) to get a cherry tone, worked out really well, got what I was after.
**I took a cart from the supermarket below my house so I don't have to care about the stain / lacquer touching or ruining anything.
**The tone really looks like cherry wood, night shots make it look really dark and unfortunately, ruin the color. Will update tomorrow with the day-time pictures so you can see how it turned out.



1st stain layer:

1st lacquer layer:

END RESULT:



Sorry, I don't have any day-time pictures, I'll only get them tomorrow with the damage pictures. More to come: Better scope mounting (getting a rail extender) and a 6mm barrel for the BBs.
Will update tomorrow with current damage (around 450-500 FPS), and again when I get the barrel next week.