Infiniti2000 said:
Buying them, yes, making them, no. You can't make a scroll of a [Good] spell if you can't cast that [Good] spell.
Align Weapon doesn't take on a subtype until you make the choice as to how you're aligning the weapon.
Unlike a potion, where the creator makes all choices at creation time, scrolls or wands don't have that limitation.
You don't scribe a scroll of Summon Monster I: Celestial Badger. You just scribe a scroll of Summon Monster I. An evil cleric can scribe a Summon Monster I spell, and then a good cleric can read it, summoning a Celestial Badger and giving the spell the [Good] descriptor.
Likewise, you don't scribe a scroll of Align Weapon: Good. An evil cleric can scribe a scroll of Align Weapon, and then a rogue can use UMD to activate it, choosing to align a weapon Good and giving the spell the [Good] descriptor.
An evil cleric could not, however, brew Oil of Align Weapon: Good... only Evil, Lawful, or Chaotic (assuming a Neutral Evil cleric and deity).
Arguably, an evil cleric could scribe a scroll of Align Weapon, and then use cross-class UMD to activate it for good alignment. In which case, he could use that to provide the prerequisite for brewing a potion of Align Weapon: Good...
-Hyp.