Some great suggestions here! Since most players are likely to use this scroll a few times, would it add flavor to use several and choose randomly?
My thoughts: Continue the cursed = cold imagery and still be informative, e.g:
"The terrible chill slowly fades from your cursed equipment."
Tiber, I have to say that this one hit me on another level entirely:
"A warm, soothing feeling passes through your equipment."
That brings rather different things to mind for me.
How about:
"Your cursed equipment begins to vibrate as you read this scroll, building to a shattering climax. You hear a spectral voice telling you that you are special and promising to call you sometime."
Oh, wait...
Another wacky suggestion could be that when you drive the curse out of the item, it has to go somewhere else, perhaps generating a "malevolent cloud" of poisonous or confusing vapors. This could have some tactical use, particularly in the early game, but these scrolls are rare enough not to unbalance things. ?