u can try to diy, if u sand the lacquer mildly with a fine grain sand paper it will make the neck feel smoother, but it'll sort of destroy the gloss in the process
wahaha, u spilled coke on ur neck or what! haha try using a grainier sandpaper perhaps? but if u're going for aesthetics, better to refinish ur neck to a matt or something similar. sanded down lacquer.. vintage! >.<