This boat moored up next to us last night.
There is much talk of wrapping as a way of "painting" a narrowboat, or indeed any boat.
I had a very close look and even close too its difficult to see the joins. As this is a printed design its camouflaged to a great extent. I think if it was to be done as a single colour it would have to be done in a continuous strip or the joints over the windows at the shortest point.
The windows have also been done and from the outside they look covered but on closer inspection it can be seen they are full of small holes. The owner said looking out was different.