Never tried it on black, give it a shot and let us know how it comes out. Don't know what it is about those blue plastics but they are by far the worst for doing that.
If you heat them up with a heat gun it will make a big improvement. Just be carefull not to melt them. It may take a couple of times heating them up and letting them cool down. I'v also done it with a propane torch.
No, I mean they are not allowed at all. NO GLASS BOTTLES. $75 dollar fine if you get caught with one and if there in a really good mood they will confiscate all of it. Just keep it in your trailer and poor it into a plastic cup.
Something about chest protectors, every time I go out without one I eat shit hard, I think it's a mental thing. I"ll strap on empty beer boxes before riding without something on my chest.