Take her to an Olive Garden, remove all the napkins from half a dozen tables, and then have the families eating at those tables wipe their hands on her when they're done with their meals.
You could throw a pie in her face. And, for being pied, she could be dressed with the same clothes the girl who got chocolate on her head was wearing on this video, between 2:50 and 3:10.
This is somehing I've never seen around here, and it would be very funny. And it doesn't seem to be so expensive to be done.
As soon as she walks through the door hit her with pies and bring her in for a pudding bath in one of those plastic bins. The kind messygirl has wanted to do
"Barely there" lingerie, pies, cake batter, chocolate syrup. With face dunking, pie throwing batter pouring wow she talks to the camera about the experience
I would like to second this suggestion.
Alternatively I really enjoyed the recent "Dessert tray" scenario, so another scene along those lines would be grand.
Meh, why settle for silver or gold? If you adonize niobium you can get a whole spectrum of colors. Makes a nice alloy with silver and helps it maintain its luster.
Given it's the spring: I'd say copious bright neon slime. Like some type of luminescent rave glow. Besides it not like WAM and PLUR were made for each other or anything.
I'd say tie her arms and legs to a chair. Maybe wearing a one piece suit and fill her up all the way with some gunge or custard, then pie sandwiches everywhere.