Sam: You're great in the locker room, pal, and your reflexes might die hard, but you're weak when you put your spikes on.
Seamus O'Rourke: I was clearing up your mess.
Dierdre: My mess? Oh, well, you take over then.
Seamus O'Rourke: Eh?
Dierdre: But you can't, can ya? It's you that's hidin' isn' it, Seamus? It's you that can't show your face.
Answer: It's a while since I've seen the movie but if I'm remembering correctly, the meet was at short notice. Gregor had the case prepped for the swap but didn't have a chance to paint it in enough time for the paint to dry properly.
The_Iceman