Gisher |
My thought is that Sharding says it makes duplicates of the weapon. It doesn't say that it duplicates things that are stuck to the weapon. So dirt, blood, or poison that are coating the original blade wouldn't be on the duplicates.
I do think that spells that alter the properties of the weapon, like Greater Magic Weapon, would affect the duplicates because they alter the properties of the original weapon.
But these are just my opinions.