I want to use mostly clay in my first coat, then a mix of clay, sand/silt, wheat paste in second and final coat I may use linseed oil. The truth is, I’m clueless! I put a test spot of clay on straw today and it won’t dry. I have no idea what that means. More clay, less water? I have been reading so many contradictory things that now I’m confused. I thought this would be simple but I need a little guidance.