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Question:

Why are black holes depicted as flat discs?

If gravitational forces are omnidirectional why are black holes depicted as sucking matter in from only one side, emitting radiation in a unidirectional pattern in from the suck side and the spit side, and having a flat disc at a single event horizon?

Answer:

I know what you mean. I have a huskie and at times, his hair loss is ridiculous. I use the thick Scotch tape and just go over the coat with it. Most of the hair is picked up by the tape. Best of luck to you.
When I was a Boilermaker we would have to make special bricks from time to time to fit certain fireboxes. Typically this was for incinerators or waste burners. It was too difficult to find the proper ones that we needed to just replace a couple of bricks. What we would do was make either a welded or wood frame to match the type of brick we were creating and then use high temperature refractory mix that comes in two forms (lightweight and heavyweight). The mix is in bag form with two different weights even though the bags are the size physical size. It just mixes like regular concrete and pours the same too.
No. Cardboard is cardboard is cardboard. It is one of the lowest quality paper products, and has a garbage archival quality, because the acidity of the wood pulp makes it decompose quickly. That is why it is a horrible choice for any art that you want to last. Acrylic resin is essentially your only semi-affordable choice, basically because it will help to stabilize the naturally self-destructive nature of the cardboard. There is no liquid metal that hardens magically. There IS metallic paint, but you would have to put dozens of layers on to achieve any sort of cohesive strengthback to resin. You don't like the idea of resin, and you don't have enough of a budget to even do your sculptures out of paper mache powder, which would be 10 times better than cardboard. There is no magical coating you can afford that will do what you want, and of course real metal would either be melted, burning your cardboard, or be quite thin. Which is your only other option - Aluminum foil, possibly glue laminating pieces or sheets together for added strength. I would suggest a spray adhesive (done outdoors, away from buildings, using a large cardboard box as a spray booth.

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