Yes, it's pretty flexible at it's factory width.
Proper fasteners would depend on the exact application.
This product weighs approximately 10.5 pounds per board.
It has little structural integrity on its own. It needs to be backed by a thicker material.
No its hard somewhat satin surface/finish. You would need to sand prior to painting.
I would think so. Its a hard satin surface. Tape should come off easily.
This product would have a Class 3 or C fire rating.
It's primed MDF
No, MDF board will soak up moisture from it's edges and deteriorate very quickly. The finished white surface is resilient and durable but it's an interior use only product.