Throwing silversheen

[Pizza Lord]

Assuming a vial of silversheen was a breakable container, similar to alchemist's fire or holy water, can you make a touch attack (similar to a ranged sunder perhaps) to throw it at an ally or enemy's weapon?

Could you then have its effect apply to the weapon/item? Normally it's a standard action to apply, so I'm thinking no, since a person with multiple attacks could hurl two or three at his companions and grant them silvered weapons much faster than otherwise.

[Bob Bob Bob]

So you should post the link to the item, there's apparently two. One is a special material, the other is this one which is probably the one you mean.

Silversheen wrote:

This shimmering paste-like substance can be applied to a weapon as a standard action. It gives the weapon the properties of alchemical silver for 1 hour, replacing the properties of any other special material it might have. One vial coats a single melee weapon or 20 units of ammunition.

Short answer, as written, you can apply it to an ally's weapon, an enemy's weapon, or any other weapon you feel like. There is no "you must have the weapon in hand" or "be within sight of the weapon". It's a standard action every time though.

Long answer, try an experiment. Get some LARPers, a paintball gun, and shoot their weapons once before they start fighting and see how much paint ends up on their opponents. I'm guessing bludgeoning weapon users will have an easier time of it than slashing weapon users, but I don't expect either to get much use out of the painted part of the weapon.

So either the substance is magical (and therefore applying it at a distance is fine, still a standard action) or the substance is (al)chemical, and therefore you need to actually coat the weapon and not just splat it on part of the weapon (so still a standard action). So, always a standard action.

[That Crazy Alchemist]

No, there are no rules to support applying alchemical substances or oils at range. Though a GM is welcome to allow it if he'd like.