Do you want high quality, or table ready?
I can't help with the first, but there's a shortcut to the second I immodestly call Worktroll White, which helped me get through two Level IIIs of Blakists ;)
Step 1: Base black
Step 2: Drybrush white all over
Step 3: Go back over panel lines with a black fine-tip pen - not a micro pen, something like a uniball 0.5mm. Doesn't matter if it's a little heavy, because ...
Step 4: Drybrush white all over, with lightly loaded brush, another 2-3 times.
Then detail, as required. It gives a good high-contrast flat white outcome.
For WiE Beta, just do light grey on the legs in step 4.
W.