Heres how i did it:
First off, i used OPI nail envy as a base coat (my poor nails are still recovering after their last acrylic stint).
For the white base i used Revlon Stay Perfect nail colour in White, this is actually a tip whitener for french manicures, but its the only opaque white i had!
For the stripes i used a really small paint brush and Barry M black nail polish. i dipped the brush in clear polish first so it dried stiff, to avoid the bristles fanning out or bending to much whilst doing the stripes
I finished off with a swipe of OPI fast dry top coat :)