When Raven crash lands on Earth in Twilight's Last Gleaming (2014), her space suit's mask is clearly cracked. Yet when she is collecting the hydrazine, her mask is suddenly intact again.
When Raven returns to the bridge to plant the bomb, there are chunks of cement and lots more vegetation than seen just days earlier.
Hydrazine is not red, it's colorless. It cannot be made to detonate like nitroglycerin. NASA tried using a half pound of C4 and firing a small projectile at a container of hydrazine at 6.1 kilometers per second, and various other methods. Firing a bullet into smokeless gunpowder will not make it explode. Assuming Raven had managed to construct a functional explosive, covering the top of the can with foil would only have it spraying burning stuff harmlessly into the air like a firework.