The background of these were done with my FW inks. I wanted something quite bright and fluid and when you spray them with water, you can get lovely effects and blending.
Another background you can use is Neocolor crayons. I love how rich the colours are and by adding water, they spread over the whole page like paint.
I've never tried drawing onto a Neocolor background before so I didn't know how the pens would behave. The waxiness didn't stop me from being able to use my white Posca pen, or the Sakura pens!
In case you were wondering what the red squiggly lines were drawn with, I used a chopstick drawn into the wet blue paint. :)
I hope I've given you some ideas to try out.
Have a lovely weekend! xx