ghost strips are usually done in 2 ways. the first is have a light layer of semi-translucent paint, so it give or yields a "frosted" look, kind of like etched glass.
the second is harder, you pick the same color, but 1-2 shade lighter, this way, the observer has to take a double look to actually see the strips. hence the "ghost stripe", is it really there. it can be "blended" or applied as a seperate layer.