I think this man is on to something!with silver ingots at a grindstone......
Gosh, I guess I never actually tried it. Just assumed. Well look where that got me! Thanks for clearing that up sir!in fact silver weapons CAN NOT be improved with the grindstone.
That must have been a glitch because i have never been able to improve any silver weapon.I know I've upgraded a silver sword before........making a daedric weapon maybe?