As part of the milsurp fraternity, I generally put reblueing on a level with child molestation while kicking puppies and drowning kittens. However, as Nipster points out there are probably lots of 60% or less S&Ws that have no real historical significance or provenance, so is there any real harm?

All that said, at the end of the day it is your gun. If you are prepared to accept that you will never get that money back and you like pretty guns, then go for it.