Waterfall - My horizontal water line at the base of the waterfall was not blended out enough, even after I "scrubbed" it a little.  To give the impression of white water splashes, I applied some white gouache to the line to soften it, and I couldn't help splattering a bit.

Winter Forest - This was super fun with the salt effect.  I used Daniel Smith's Moonglow for the purple, Sennelier's Indian Yellow and Daniel Smith's Lunar Earth as a burnt sienna substitute.

Sailboat

Autumn Forest - I saw that my paper was still moist at the base of the trees and chose to scratch in some twigs and grasses that remained white.

Palm in Pink Skies - I used Qor's Quin Magenta and Sennelier's Rose Dore Madder Lake for the pink/orange gradient and Daniel Smith's Moonglow for the dark purple color.  I switched the position of the palm tree because I saw a nice break in the pink clouds that I did not want to cover.

Lush Tree - I used Holbein's Olive Green gouache and M. Graham's Phthalo Green at the base of the tree. I was worried that gouache would not spread like watercolor, but it did fine.  I used Daniel Smith's Rich Green Gold for the lightest green and Qor's Indigo for the darkest value.

Misty Forest - I used Daniel Smith's Amazonite Genuine and switched up the tree shape to be more like eucalyptus trees that are plentiful in my area.