Just painted the engine bay

There are several reasons you are getting orange peel. First off what brand of clear are you shooting, what if any reducer are you using, what psi are you shooting it at? Orange peel can be knocked down and buffed out so its not that big of a deal. Me myself I don't reduce the brand of clear I use. Hit it with some 1500 then 2000 buff it out and call it good enough. It also from the looks of the fender is really dry. Slow down your passes play with the psi and volume and you may see a difference.