Outlined Marble keeps glowing

Hello there, finally I have time to write. I'm back to neutral colours, black and white today. There were two things on my mind when I planned this: glowing polish and outlining. But outlining pure white space would be far too simple for me and that's why I decided to go with acrylic watercolor effect, also used in Outlined Galaxy and Don't Panic manis.

I painted my nails Gabriella Salvete 148 white and then two coats of Essence 18 fly firefly fly glow in the night top coat before adding the black (black topped with this glowing top coat looks off, it ruins the contrast). Then I did this acrylic-watercolor technique and when that dried, I outlined my nails with black acrylic paint. Everything is sealed with NYC Turbo Dry top coat.

You can see my right hand above, this time I didn't have much trouble outlining with my non-dominant hand (unlike the first time).
I even menaged to properly capture brightness of the glowing:

 Yea, funny shapes.

On the other hand, both hands photos turned out rather weird. I blame the colour scheme.
To the title - don't these remind you of marble rock? They do to me.

I have one more thing to ask you: would you like to see a tutorial? Tutorial on how I do this watercolor with acrylics, cause you can find a lot of tutorials on outlining out there. Also, would you like to see a tutorial for any other of my designs? (And seriously, what preposition does tutorial come with? Tutorial on st/ tutorial for st? I wasn't able to find it on the internet.)
Bye!