I would use wipe on poly over Danish Oil. Danish oil also already has some poly in it but you can still poly over it, just make sure you let it cure completely (several days depending on temperature) before you top coat it. I'd probably wipe it down with the oil, let it sit for a couple days, give it a second coat of oil, let sit several days again, then coat it a few times with wipe on poly, using 00000 steel wool between poly coats. The poly doesn't need multiple days to cure.