There is a middle ground I guess.
Ftr: What's that you're putting on your arrowheads, Ranger old chap?
Rgr: Lightly toasted ash slivers, dipped in belladona sap. Well known to cause grevious wounds in aberrations. I'm putting this mixture on all my weapons, in addition to that stuff from earlier.
Ftr: The silver-dust thing?
Rgr: Yeah. It's a really mild version of holy water, but if it's right in the wound, it causes a bit of extra damage to undead.
Ftr: Could you put some on my weapons?
Rgr: Sure! Of course, you'd need to change around how you carry your stuff, or it'll denature right quick. Your sword would need to be wrapped in this anti-dessicant lichen inside its scabbard, and your arrows would need to -- wait, you don't have a bow, do you?
Ftr: Er... lichen?
Rgr: Okay, no worries. Let me show you how to gather this bark and lichen. You really need both to be fresh or they don't preserve the sap at all.
Ftr: Er... gather bark? Maybe I'll just keep polishing my sword with normal oil.
Rgr: Suit yourself.
-- N