There is a massive difference between a guitar that simply "plays" and a guitar that "sings." That difference is almost always in the frets.
For the final polish, switch to steel wool or fret polishing erasers. Work along the length of each fret, moving with the string direction, not across the fingerboard. This will bring the frets to a brilliant, glass-like shine. fret work step-by-step pdf
Mark the tops of all frets with a felt-tipped marker ("blueing") to track progress. There is a massive difference between a guitar
Once all interior and exterior cuts are complete, you can proceed to the final detailing stages. Pattern Removal moving with the string direction