Without having it in hand it’s hard to say but you should be able to get pretty close with the flap disk. Mouse mat on a bit of batten and various wet n dry to neaten it up to a cracking convex.It's like t cutting a faded red car... No change, no change. Too late😂😂😂
I've filed the chipped edge flat, then filed a edge on it. The flap disc is pretty goof for reprofiling, but I don't want to go mad mad.
I've got a dmt dianond file.somwhere.
I haven’t sharpened mine in years and it has fairly frequent use. it still snicker snacks through branches nicely. I have a finer edge at the hook going down to a lumpier splitting edge at the handle.