It is on a veneer top!

What's really annoying is that on the rest of the body, including the same area on the bottom horn, the Tru-Oil's thick and taking ages to sand off!

Done the back and sides, now doing the top, but my Amazon prime order of sandpaper still hasn't turned up yet and I've exhausted all my good sandpaper, and the cheap stuff is going in the bin as it's useless.