The crack can occur during the repair.
I would carefully fill the crack with clear nail polish. This will help keep it from corroding inside.
Thanks for the tip. Would you apply the polish with the supplied brush?
Yup, even lightly razor blade the loose ends of the crack and apply some touch-up paint. If you don't that might haunt you later. Potential rust
Those guys do a nice job given the conditions they are presented.
I've done bodywork for decades and I watched the guy knock out some of my dings and I was amazed.
I think the hood is aluminum. Its an 09 F150.
To do small touch-ups: A match out of the old school match books works better than any brush...Give it a try, you'll see what I mean.
Just put a moderate amount on the ripped end, the paper helps control excess paint. Used that method in car dealers for years.