Ok, assuming you are. I haven't done this for a while, but here's my take on it.
Waxed areas (designed to stop the paint sticking in places) can look a bit "obvious". It's definitely done, but can cause problems at the edges of the paint where the wax overlaps.
Rub down to get good adhesion for the paint.
No need for eggshell.
Use ordinary emulsion in your choice of colour
A thinned coat all over (preferably so you can see through to the wood)
Second coat all over except for the areas you want to show through.
Sand the "see-through" bits as much or as little as you fancy.
This will give the old "limed" look to those areas, where some paint is still visible in the grain.
Either leave it like that, or...
Wax, or
A coat of matt or satin acrylic varnish to seal the whole thing, and bring the colour out of the wood, or
If you want the ancient, nicotined-stained Irish pub feel.......... finish with a very thinned down polyurethane varnish, which will put a brown tinge over the whole thing.
Have fun experimenting. :o)