In addition, they will know whether the recent vandalism ever existed if you had again for new vandalism?
Well, this question can be much room for interpretation.
First, a new insurer know if your vehicle a total loss, as here, the insurance was considered too much access to information on all accidents (within 5 years)
Second, if you filed a claim of vandalism, they will. If you are not and you now want a file, say they are in a position that is old and what is new vandalism and it is their discretion to decide to cover vandalism old.