Ian and Barry, thanks for your input, one of the reasons I asked about refurbished Koshirae is that from what I have so far seen there is not too much opposition to this with regard to Japanese blades, no doubt this could be attributed to the great age of some of the blades, I ask because I have collected Third Reich edged weapons for a good number of years and it is absolute anathema to collectors in this field to alter anything that changes the original integrity of a piece, as I have looked at some of the dealer websites it obvious that some of the swords, especially the very old ones, have been refurbished, but I hear what you are saying and will bear it mind and will keep you posted, though I will not rush into anything, a lesson I learned as a much younger man.
Thanks again
Nolan