Thanks to reader Jeales for his information on these things that are 'growing' on my bumper. Apparently these are not spores but eggs from an insect called Lacewings. So, it did not grow on my bumper.
I have seen this insect in my garden and from what i have read, the Lacewings Larva also known as Aphid Lions eat all kinds of pest insects.... thats good! Whats interesting is that the lacewings layed these eggs exactly on the same spot as last year.... hmmm