I carefully use a Dremel, with a parting disk, removing the least metal I can yet still maintain the blade shape/profile. Sometimes one has to grind back both the cutting edge, *and* the drop down to the point, sometimes just one is OK. Depends on how it looks to you.
You'll have to perform a major blade resharpening afterwards: IMO best done with something like a Lansky, that can remove larger amounts of metal and keep to a set sharpening angle.