Some Fret-101
Fretting a neck, and RE-fretting are two totally different animals.
Fretwire comes extruded with the crown as it needs to be - the only reason to re-crown is in the case of frets that have had their crowns altered in some way, usually by filing or grinding.
When a neck is fretted, the fretboard is new, and very very precise. The fretboard controls how level the frets will be, as that is what the frets ride on. When a neck is RE-fretted, the board is usually older, played on, has had frets pulled from it... etc...and the work is done by hand, and less precise.
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In my experience, the Warmoth neck fretwork is as good or better than what you get from Fender, or Gibson on a finished guitar.
That said - you might need help removing finish, or help with a sharp fret end, or other minor tweak. In the vast majority of the cases, no fret leveling (as opposed to finish leveling) is needed. Zero, zilch nada none.
In my experience with oh... wazzit now... eight necks or so, I've had exactly one (1) fret issue, and that was a fret that was not fully seated at fret 22. Thats it. Tap down with plastic hammer, done. No recrown or filing or such.
On the other hand, I've got the patience and skill to determine the exact problem, and tools and determination to correct issues. If you dont have any of that, expect to pay someone to correct problems for you. Dont expect that person to be good at it, if they're used to re-fretting.
A "pull, sand, press and file" man will (usually) not be the guy to go to for a NEW neck's minor issues. The first thing they do is sell you on (or just perform) what they know how to do, which is file or grind frets and recrown and polish. This is a lot like taking your car to Sears for auto work. You could have a hole in a piston, and they still want to sell you a battery - because thats what the do. You always need to be mindful of getting the right person, with the right skills and experience for the job. You need someone who knows new necks, not someone used to dealing with worn frets.
It really upsets me, when I hear about some fret-man sanding down a brand new Warmoth neck. Breaks my heart really.