These work well enough. Though next time, I offer this advice:
Any time you are attempting to create a certain kind of damage on a model, try to think about what caused the damage. How did it get crushed, what crushed it, what material was that made of, etc. Then try to find pictures of that kind of damage in real life, usually from car crashes or construction site vehicle accidents (the ones without major injuries). It can help give a clearer picture of the effects certain kind of damages cause. This is also helpful for the painting stage later on.
For example, a crate that dropped is going to have different damage compared to a crate that got smashed by a heavier crate being on top or a forklift piercing the side of it. Hitting wood will leave different marks than hitting concrete or metal.