doubt it - Edit 1
Before modification by NaClH2O at 08/09/2009 01:17:10 AM
It's possible that whoever gave Rand the sword just fancied it up and personalized it with some paint before giving it to him, and the paint was not a part of the original.
It's possible I suppose, but even today with the solvents and paint technology we have today to get something to look even antique, much less "centuries old".
NaCl(it strains my credulity just a bit too much)H2O