Cut Liners

I've had these brushes for a few years without finding a use for them; now it's Winter,traditionally a time for trying out new stuff and generally messing creatively around...
This is a stoneware clay [not my usual Solargil] with a white slip;mauve deco is the fatter cut liner brush with my blue [cobalt and iron] slip,magenta is the thinner liner brush with red iron/manganese oxide mix.How will it all come out? No idea [that's why I photographed it now]. Can you get these brushes in Israel? Same answer.