When Iron Man is being helped into the avengers airship after the locals hit him with a large log, his armor is visibly damaged. Next time you see him, he is closing the door and his armor is whole. Then the next time you see him, his armor is damaged again!
On the computer console in the room where Dr. Banner is being held prisoner, the same red button is used to perform many different operations (in one scene it fills Banner's chamber with gas, while in another it drains the gas from the chamber.)