I have used a WB filler from Fuhr Products mixed with a variety of water
or alcohol based dyes and stains with good effect. I have not tried Japan
Colours though. If you ask your question in the forum below I am sure you
will get your answer. Cheers, JG

http://www.homesteadfinishing.com/phpBB2/portal.php

" wrote:

I need to fill the pores of white oak blue for a customers project. Is
it possible to mix japan colors or some other dry color into this
"soupy" pore filler? Should I use water based or petroleum based? These
will be topcoated with a water base clear finish call Ceramithane made
by Graham Paint Products.

Any help or suggestion will be greatly appreciated.