I think it's the same thing as the Transparent Medium of the Mission Models that I tried on my Sherman "guinea pig", it's none other than the resin that carries the pigment in normal Ammo paint but without pigment,the more you add and the more the pigment is diluted,more carrier and less pigment so' that the coverage decreases significantly and gives you that effect of shade/glaze, the color does not actually become transparent like Tamiya transparent paints but more like a super thin color without the problems that a color very thin can give like spiders or become a wash and flow into the recesses instead cover the whole piece...it's like having a very thin paint without adding the thinner....acting in the same way even on the Matt agent increases the perception of "transparent"without really being it, I have tried with a color dust and with a preshading and for me that with the AB I'm not a master makes it easier to avoid the mistake of covering too much


in this video shows how it works with the brush...

https://www.youtube.com/watch?v=neqd80fFgA8

So... just add a little color to some future for the same effect?