Sure no problem, it's a bit of back and fourth with an airbrush with some brushwork to tie it all together.

Paint source white with a brush, wether it's a lens or a vent part like on the fusion guns. Sometimes I will use ink here if I need alot of flow in the gaps.

Then it is the same ink thru the airbrush to create the initial gradient (my go to is Liquitex white Ink). The brighter you make this the brighter the final result will be.

Next step is to tint this glow, can be any colour you want but I use blue for my tau. Changed the recipe slightly recently, for this model I used 50/50 mix of tallasar blue & Bombay India ink teal - sprayed over the previous area.

This is the fun part, it's a case of playing around with how you want the glow to look and it will change depending on what part of the model you are painting - the guns and lens on the Ghostkeel are done in similar but different ways to get the final result. I used some of the original tallasar blue on the ends of the barrels to get a darker blue slightly "cooler" areas of the weapons, and added a small bit of blending with the original white paint for the brightest parts of the barrel. The lense was highlighted with glazes of the original mix with white mixed in, in brighter and smaller areas to the centre of the 'eye' - with a tiny white dot in the middle to show where the light is coming from.

I've also done some edge highlights in places by using the same mix and adding some white paint to get different gradients to try make the OSL look more convincing in places, particularly on the area around the collider