Andrew Nelson Lytle, Bedford Forrest and His Critter Company, p. 139 --
Among the captured stores at Trenton was a regulation officer's blade. The General took it, tested it, and ran his finger along its dull edge, for like all officer's swords it was sharp only a short distance from the point. He took it over to a grindstone, and there with an orderly he ground it to a razor's edge. Someone who had been in the regular army protested that this was contrary to all military precedent.
"War means fighting, and fighting means killing," replied the General.The grindstone turned over.
The obvious implication here is that Forrest approved the use of "enhanced" blades. I cannot imagine that he would have objected to the enemy's use of the same practice. If nothing else, Forrest was a fair and reasonable man.
If you're interested, I'll provide references to Federal use of the saber which made their cavalry superior to their Confederate opponents, particularly when fighting on horseback.