Alright, I'm convinced. I'll put up a write up on how the gun was constructed soon.
In regards to paint, Funny you should mention that because I just repainted the entire gun. The original paint job was done with a base coat of satin black and then dry brushed with flat aluminum acrylic paint. I then put a wash of dark brown for weathering. I was 98% content but had to push for the extra 2 %. My issue was it didn't look as "antique" and I had originally envisioned. The black/silver contrast was too high. So last night I put on a base coat of dark brown and dry brushed with a mixture of aluminum and brown. The effect is now more subtle and the antiquing looks much more natural.
I also took care of a rattle the gun had. Some of the plastic parts were filled with BBs to give the gun more heft, and a few were rattling. I drilled some holes and filled the voids with spray foam and then hid the holes with a couple new knobs.
Now I'm done - I think
