Pedlin Wisdom an Wares

Today's post brought me this wiv no name on:

Dear Wagstaff,
I've heard about something called Corrosive Wash. Sounds a treat for a project I've got in hand. Where could I find some? Does it come by the barrel?

Yeh'll be wantin to see a pedlar about that, yeh will.

In fact, I could set yeh up if yeh were goin to be at the Frost Faire. I'll be there, if yeh look sharp. Ol Wil an his handcart'll be supplyin the crowds with doodahs and froufras, an he'll have a supply o off-license items, too, if yeh know to ask.