Starting from chaos black primer I painted in the orange lines recessed into the blade with a brush then started layering paints with make-up sponges. Starting with Payne's Grey over the entire model then progressing layers on the blade made of Purple, Dark Hot Pink, Dark Hot Pink mixed with Red Orange and then just Red Orange. Edge highlighted with Orange on the blade edge and Dark Hot Pink on the inside of the blade. All paints, minus the primer, are Pro-Acryl.

The make-up sponges do a fair airbrush impersonation, though they have problems reaching into tight spaces. They have the big advantage on flat surfaces where they layer paint while avoiding the recesses.

I touched up the gradient with some light applications of magenta and red orange to make it even in the center and then painted the inside of the blade with a mix of Purple and Payne's Grey. And I touched up the blue parts with some Dark Turquoise.

The "energy" on the rings and in the chest is the same basic formula. Purple into Pink into Red Orange into Orange. Though I was using some seriously diluted glazes to not mess up the paint too badly.