i've also asked this on the klov forum, but perhaps someone from you nice guys can jump in here, someone who's done a lot of cab painting perhaps

i'm getting ready to repaint my joust 2 cab, but before i start with the BLACK base color, i'd like to put some wood primer underneath. the cab had some serious water damage and i had to use a lot of wood filler to restore it, so i don't want those spots / areas to shine through the base color.
for my previous projects i have always used white wood primer, but now i've read somewhere (don't remember where though) that you shouldn't be putting white primer underneath a black base color. is that correct?
over here in germany we only have two types of wood primer, transparent wood impregnation and the white wood primer.
my questions:
- what type of wood primer are you using before painting your cab (if any at all)?
- is it ok to use white wood primer underneath the black color?
- my wood primer is water-based, the colors are oil-based - could that cause any problems?
looking forward to your answers, this is my first complete paint job (cab is stripped down) and i don't want to take any chances.