Stress marks on bumper?

Hello, My name is Jeremy and I am a plasti-dip free baser...

Just plasti-dipped my rear bumper while hanging out in the garage with my Pops and when we sprayed it, we noticed that in each corner of the bumper there looked to be some stress marks from the bending process. Not that it is a big deal or is very noticeable, but I thought I would share these pics and see if anyone else has noticed this. We just thought it was funny because even though we sprayed more on the spots to conceal them, they kept coming back out. The plasti-dip came out really good and adhered really well. We also did the emblems and the center caps of the rims. I can't get good pics of the thing as a whole right now because I'm all packed up in the garage waiting for the hurricane to pass over us before I get it back out.

Oh and we didn't notice any discoloration or markings on it before we sprayed it.