The electrostatic paint is called Powder Coat here in the US. It's too bad the shop that did this work for you were not more careful. It is a very hard and durable coating which is difficult to remove. It is amazing you were able to install the cups.
As far as the bent crank arms. Possibly a machine shop might have a press that you can squeeze them between to straighten, but I have no idea other than that one.
The other possibility is one from another Raleigh such as a Sports, etc..
Your choice for the Brooks saddle is perfect, in my opinion.
