Wooden Canvas

[http://users.livejournal.com/_delicateterror/]

A while back I posted about painting on a wooden canvas. I got some good feedback as to how I shou proceed.
I used clear gesso (two coats) on a test board and I've tried water colours and oils mixed with alkyd and
some of the time the colour bleeds and other times it doesn't. Argh!
Anyone have any ideas as to what I am doing wrong?

Thanks!
DT