Don't worry, I have long ago given up the idea of trying to get people to use Photoshop.
Btw. the "clean-up" issue of overpainted elements (minutes 32-36) - be it in layers mode in Photoshop or by manually swapping it with a brush in Paint - is why I prefer to use entirely separate colors (or maybe rather: shades) for railings, antennas, rigging and the like.
This becomes difficult though when the railing or rigging passes in front of the camouflaged superstructure. The method I've developed (of creating a mask and then deleting its inverse) seems to be easy enough.