You are misunderstanding! Augustus fell into a gap between the wall and the river (the gap was hidden from the audience so they thought he was falling into the river). So he never came into contact with the river at all, so remained clean. We concealed a pot of nutella (chocolate sauce) in the gap so when it looked like he was leaning over the wall to drink from the river he smeared some on his
face which looked great. That was easy to wipe off afterwards.
He didn't join the Oompa's for their first song - worked fine with them on their own. Hope that helps - and good luck with the show!
