Here's my update. I kept it oiled all week and then cleaned the blade by scraping with another knife. It had some chunks of rust scaling which scraped off pretty easily and then I washed it in the sink with dish detergent, barkeeper's friend, and a pot scrubber. I did not want to use steel wool or scotch bright on this. The pot scrubber had been recommended to me by a gunsmith for cleaning gun blue also with oil. So I'm pretty happy with the way it looks now. I just wanted rid of those lumpy bits of rust that bubble up on the steel on something that's been sitting in moisture for so long. Also I should mention that the edge on this came clean and sharp with very little scraping. I'm not cleaning that thrower at all. It looks good enough the way it is for me.