This is what I know. It is not 100% complete, maybe 90%. Some scenes are damaged beyond repair, mostly nearing the end. I'm afraid that those parts are lost. The majority of the work negatives and the distribution copies of the 40's and 50's were destroyed once the rights lapsed into the public domain. The archived originals are damaged - lost. This copy comes from an old 2" Ampex video tape - a recorded transcription from a 16mm film used for TV / Video Distribution - done in the early 70's using a telecine. The reel was an edited composite of diverse surviving positives.

And I just found an article where Keaton said that they used a thin layer of wax over the water, painted to look like bricks!