Great setup!!!! Love what you did with it!
I'm in process of building mine right now and as far as the top and bottom go, the wall where it will be sitting on will have absolutely no position for where anyone from any angle could possibly see the details, so, in a rare move, will not be creating those details. On the bottom though I will be having a mesh covering where a couple speakers will be to play sounds of the idle carbonite for effect. My ceiling is about 91 inches tall, which doesn't leave much top/bottom gap.
So you used Bondo first and then covered those textures with the wood glue to soften the details up to create that nice consistency?? I REALLY love what you did with that filler. I will be at that point in the next day or so. I bought the Stormrider black rubber pieces and hopefully with primer the rubber doesn't crack bad or anything over time.
With your acrylic black rub... was that a water mix and on a cloth you just went all over the carbonite to accent those details, or did you straight up smear black on and then rub it back off to reveal the nickel surface underneath? I love that weathering and want to achieve the same look.