Rusty and corroded headlight bolt

The car headlight burned out over the weekend and needed to be replaced before the start of the work week. When trying to unscrew one of the bolts, it was very rusty and wouldn’t budge. I sprayed it with WD-40 and instantly it would unscrew a lot easier. Was able to switch out the headlight within a few minutes. Thanks for turning a project that could have been more of a headache into one that only took a few minutes of my time!