So I did an all-dayer. Not to be confused with an all-nighter. Basically I worked on this yesterday from 9 am until 11:30 pm with the occasional break. Its actually the way I like to work. It drives me nuts to get into a zone on a piece only to have to take a long break from it. I think my work turns out better too when I don't stop and start again.
On the technical front, this is 8" x 18" on Pastelbord using mostly Derwent Coloursoft pencils and some Luminance. I have noticed that my yellows tend to fade when I varnish my pieces so I tried a theory I had to preserve the colors on this one. Basically, as the very last layer I went over everything with a Prismacolor colorless wax blender thinking the extra wax would protect the pencil underneath. I think it worked because none of my yellows changed when I varnished it!