1931 Duolian gone thru from top to bottom. This came to us from the original owners daughter, stripped body with a poor thick clear coat on the neck. We removed the fingerboard to lightly sand the neck perfectly straight, reinstalled the original fingerboard, and sprayed 8-9 coats of nitro lacquer on the neck. The mahogany looks amazing! Then sanded/buffed it super thin/smooth w just a touch of added wear to look correct. Feels and looks amazing. Original frets have been polished, new bone nut and maple saddle, reset neck angle, finished off with 18-1 ratio correct plain plate tuners. Ready for another 80 years!