I think you should be able to spot clean it with a silk detergent taking care not to soak the whole scarf. Is it a vintage or new scarf? I removed a few makeup spots on my 90cm new before laundering the whole thing later on. Use super cold water and the tiniest amount of soap possible. Everyone recommends the Laundress very highly! Good luck!
The scarf had never been worn; its five or six years old. I wore it three times this week, and third time was the charm.

Thanks for the advice. I only have Woolite on hand but can find Laundress easily I guess. I'll give it a go tomorrow. I'm fairly klutzy and will approach with caution.