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Someone over-tightened the chain today and started to burn up this nose. Learning lesson. I didn't look at it after he loosened it and made a final cut. I've got another 20" bar or 2 in the truck.

The drive sprocket and nose are both old, along with the chain. Lot of miles. Can you say more, please?

Look down the length of the bar. See if it is bent before putting time and money into it. For dressing, I generally just use a raker file or larger flat file, on hand. I have a bar file holder, but don't use it much. With the file flat to the side of the bar, I take off the mushrooms...

Check that the bar is straight. Grind off these 3 leftmost rivets. Slip nose off Slip nose on. Pound 3 rivets. Grind smooth as needed. Done. Check your rails. This bar was just dressed a bit. Lasts and lasts.

Noses are easy repairs. 3 rivets. If you are beating up noses so badly, I'd definitely go OEM.