You would never be able to see if it is overstressed.
In extreme cases you can tell like very hard landings but other then those....no.
You put your life in the hands of the mechanics/engineers.
But even then, if there is no reason for extra vigilance during an inspection, such as a report of exceeding limitations they may not even find anything.
Have you ever seen an idiot spinning in the parking lot with a rental car?
Those morons rent airplanes too.
I'll bet you that every C172 and Pa28 out there has done a loop or a roll at least once in it's life.
Every turkey thinks of itself to be an eagle...........
