6 weeks ago I fell off some rollerblades and broke my arm in half. It was diagnosed as a both bones fracture and I had 2 plates put in my arm. An inconvenience as it was I was then told I would have to wear a plaster full arm cast which went from my knuckles to my armpit for 9 weeks. in two weeks I am going on a vacation and I want to swim but I wont be able to in this cast. is there anyway to have my cast taken of early or changed from plaster to one of those waterproof fiberglass ones? it needs to be changed anyway. it is smelly dirty and covered in signatures. any help will be appreciated.