AviatorVette
If you look at the top of the crack there is a small amount of paint that appears to have lifted.Note the irregular shape of the two holes within that area.Looks like corrision and has been there for some considerable time.
Is it possible to get a closer photo of said area? Get an independant engineer to examine the spinner.Even if you had pushed on the spinner it would not have caused the crack unless there was an existing defect.
Good luck,
Fark