It’s poly
people usually just scratch away at the body and forget about the neck. I rounded the neck off using a metal bar and flaked some lacquer the front by the 20th fret and on the fretboard edges
you can get an old look immediately by just rubbing away at the body with a fresh dish sponge (green side) and matting down the paint a bit. Rub a bit harder where your hand would rub or the strap would rub. The key is to think about it a bit and take it in gentle stages rather than to go all out with a belt sander