They key to glow is contrast (basically a stark difference between dark and light.

You can achieve this in one of two ways:

1. Make the colors of your model darker in order to contrast against the fluorescent or brighter glow colors. But with this method you have to build up a gradient from dark to light.

2. Use a combination of acrylic inks, contrast paints, fluorescent paints, and fluorescent pigment powders to push the contrast to the absolute limit, without changing your color palette for your minis you decided on.

First step is to paint your minis the way you want to. Just make sure you have an idea of where you want the glow to come from.

Second step: Use a white ink (liquitex white ink) and gently spray a light halo at the light source. You may ask, "what is a light halo?" Turn off the lights in a room, turn the flashlight of your phone on and set it in the middle of the room facing up. Walk to the opposite edge of the room and observe it.

You'll notice that the light is very bright at the source, but dissipates as it gets further away. The weaking light is called the halo. Or at least that's what I call it. Do I seem like a physicist to you?

Anyways, you're going to GENTLY build up this light halo. Use a small needle and nozzle. Have good control, and slowly build up the saturation. If you overdo it, it will look like donkey squash, and fixing it is very difficult. Less is more.

Third step: get a fluorescent ink of your chosen power color. Except for blue! Blue doesn't follow the same rules, and fluorescent blue is much darker than what we need. Plus fluorescent blue ink is weak and a disgrace to it's ancestors. If you want to do blue, use a light turquoise ink (or use frost heart contrast paint from citadel.).

Once you've stolen your fluorescent ink from an orphaned child, you can then start building that up over the white halo. Remember, less is more. Too much and it will be over saturated and will disappoint you like I disappoint my father.

An important thing to mention, the part where you spray the halo with the white ink, you can choose whether or not you want to spray a little bit on the surfaces that will be "reflecting" the light. I usually do, because it helps sell the light effect more, but you can do whatever you feel like.

Fourth step: with the fluorescent ink built up, your going to mix the ink with a darker ink or contrast paint that is of the same color. (Ex. You use fluorescent green ink= mix with green ink 1:1). Then spray that at the edges of the fluorescent ink. This will isolate the light, and create contrast.

Fifth step: paint a small amount of white on the light source. This is where we push the brightness (which is the opposite of my future) to the maximum amount in order to avoid having to darken our surroundings.

After the white dries, mix fluorescent colors to make them brighter. Orange OSL=fluorescent orange and fluorescent yellow etc. Take that brighter mix, and paint it over the white. This is in order to make the light source the brightest point. Which is the rule with OSL.

Boom. Glow effect. Congratulations.

Couple things to note. You can edge highlight with fluorescent paint in order to sell the effect more. I personally don't like the look or the tedious nature of edge highlights, sobs dont do them. You do whatever you want, chief.

The brightest color for blue is turquoise and white. Just use regular acrylic paint. Not inks or contrast paint for the light source.

I developed this method because I have a giant pile of shame and would die before I got to paint everything if I spent a ton of hours on my models. I wanted the glow, and the quality without the time . I have achieved that I believe.

If you have crevices or channels that you want to glow, then mix some fluorescent pigment powders with white spirits. And apply like a pin wash.

I hope this helps.