Refreting a "vintage" fret is PERFECTLY normal (like changing your car tyres,you DO change the car tyres on 59 Cadillac if you want to take her for a spin,don't you?
).
Also if you decide to refret and the luthier knows what he is doing there may be no need for a re-laquer,I have refreted three 70's teles w/ maple necks and my tech managed to keep the original finish (which btw is POLY and NOT nitro
)