When the plaster gets hot and then starts to cool, it pushes lots of water out from the plaster. Sometimes (not always) this is the best time to open the mould. But it obviously depends what plaster mix is used, how big and what shape etc is the piece etc. I have left stuff sitting overnight and never had problems. Start with that.
Sure you can use banding wheel for throwing (why is it called throwing in English? ... never mind).
You need the one with really heavy metal wheel. If you do not have one, pour miniature concrete "wheel", centre it and connect it to your branding wheel. It can keep enough momentum. It will not be like your kick wheel but it still works with soft slippery clay.
If you have a correct size lifting weight (those round ones, that go on a bar) you can use that as a flywheel.
Use soft clay for connecting the bat to your modern "stone age" throwing wheel
Make a hole to the top side of the bat and use a stiff stick to spin it up.
Regardless of whether you make your own or buy your brushes, proper care and storage is important to keeping them in good shape. Many folks store their brushes handle down in a cup/jar, with bristles in the air. That is not a good way to store or dry your brush as the water runs down into the ferrule. Store your brushes by hanging them from the tip of the handle. That lets the water run down when drying and it allows the bristles to keep their shape when dry and not in use.
As mentioned before, use cheep stuff for wax (personally never used wax) and good stuff for painting lines etc.
Natural hair (dog, squirrel, sable, ox ear, pony etc) watercolour brushes are the best. For a really fine lines, I actually use really thick (>10) but fine tipped brush.
Forget the synthetic bristles. Yes, some of those will soak up paint/gaze well but will not let it go so well as natural hair does.
I got myself few Escoda pony hair round oval shape brushes with short handle. Wow... I wish I had the money to buy more of those
They will probably last for a long time.
To be honest, covering large areas with brush is, simply put, BS and I like to avoid it if possible. Pouring, dipping, throwing o_O or what ever you can come up with, will give better results. I wish I had a spray booth