I try to find a way to copy "the Skinweight of my poly with a smooth poly on it" on "the same poly but with his smooth poly directly applied" . So I delete the history on my copy, so I have my high poly I skin it with smooth bind and now i want to copy the Skincluster of my original Poly on his copy but apparenlty maya never copy the skincluster in considering the smooth poly.
I have tried : Export Skin Weight Copy Skin Weight and multiply script : copySkinCluster.mel fixWeight.mel xyHistoryTools.mel saveWeights.mel
When you do a smoothPoly Maya doesn't know what to do with the extra points that are created. Those points didn't exist when the skinCluster was created.
I suppose using wieght maps might work, but you say you haven't had any luck with that.
I don't understand why you need a whole new peice of geometry to be bound. You can just smooth the low poly version and keep your wieghting. Since the high poly (smoothed) geo is derived from the bound low poly geo it should react fine.