I suggest that there be made some consistency to items that temporarily grant special material and rune effects to weapons and ammunition.
Cold Iron Blanch: 10 gp for 1 min of cold iron (level 3) [cold iron weapon is lvl 2]Silversheen: 6gp for 1 hour of silver (level 2) [silver weapon is level 2]
Ghostbane Fulu: 40gp for 1 min of ghost touch (level 6) [ghost touch rune is lvl 4]
Disrupting Oil: 10gp for 1 min of disrupting (level 3) [disrupting rune is level 5]
No consistency in price to level of mimicking effect ratio, no consistency in duration, no consistency in level of item to level of mimicking effect ratio, no consistency in type of magic item. Further inconsistencies: the fulu only effects one target, the first two call out how it works with ammunition, the second two do not leaving it up to the players whether or not these work with them or don't like their mimicking runes do not.
I propose some consistency in the remaster.
Alchemical Oils that mimic the effect of special materials. Magical Talismans that mimic the effect of runes.Both last ten minutes, cost X% of the rune/material, level is X% of the rune/material, and ranged weapons apply it to their ammo.
I don't care much on how good you think my example is, all of the above is meant to convey this:
However Paizo wants to make it look and whatever specifics they settle on, I think some consistency is warranted.