Yeah, I should have followed up the bastard cut and second cut filing with a smooth cut file. Some of these file marks are a bit of a pain to remove even with 120 grit. once I've finished it to a reasonable standard, i'll heat treat after I've built the burner for my mini forge. Plan is either Canola or Peanut oil - whichever is cheapest that I can buya couple of litres in bulk. Then back to sanding up to 800 grit for a nice satin finish. Then its handle time, followed by sharpening and murders - I mean slicing onions. I may acid etch the blade with ferric chloride or hot vinegar before I put the handle on though. At least help a bit with corrosion resistance being carbon steel.