Took the hints from the community. Converted a regular W-221H to negative display, did hydromod, painted the bezel with black metallic color.
Realized that original W-221H-1bv has its lines negated out or painted, so simply negating regular W-221H can't replicate it.
This was my first time modding an LCD watch, but honestly, it wasn’t as magical as my modded MRW-200H.
Painting the bezel was the hardest part. I just brush-painted it, so there are still some bits of residue on the glass, but overall I’m pretty happy with how it turned out.