A bit of a cheat with power weapons! I used Daler Rowney FW ink Payne's Grey and White, but you can substitute any white or black ink, or even highly pigmented paint. I'll add step-by-step photos at a later point.
- Basecoat the entire blade Silver or Stormhost Silver
- Add spots of White and Black opposite one another alternating down the blade - Three pairs will look best on a normal 28mm sword. (as I said above, I used White and Payne's Grey from Daler Rowney)
- Before the spots dry, smooth them out so you get a gradient from the silver up to the white and down to the black, but leave pure silver showing between.
- Thin down the black ink 1:3 with water and glaze from near the centre of the white to the black, leaving a little pure white visible. The direction of your brush strokes is important - always move from lightest to darkest, as that's where the brush will deposit the most ink.
- If you're happy with the blend, leave it here, but if you want it smoother, repeat step 4.
- Glaze over the whole blade with a 1:1 of Turquoise and water. You could also use Guilliman Blue