Vanessa

This is the first time I have worked with a wet palette.  I seem to be having issues.  First, my paints ran. Even with just a pea-sized amount.  Is my sponge and/or paper too wet?  Then my paper has absorbed the paint and now it is blending with anything I put on top of it.  I am trying to avoid the paint from the day before, but I run out of room quickly.  the previous day's paint is seeping into the paint I am using for the next lesson.  What am I doing or not doing?  Can anyone help me out?