On 4/3/2019 at 3:58 AM, Sorastro said:Thanks a lot mate!
The flow aid is quite interesting; firstly I would restate that it's not essential, and yes you can just thin with water. It's hard to describe in words what the effect is, but it reduces the viscosity of the paint allowing it to be applied in thinner, more smoothly-flowing layers but without over diluting the colours. Overall it really does literally aid the flow of the paint, so when I'm brushing on the skin tones for example, I just lightly touch a segment of skin and the paint just more readily fills the area. It's also really good for painting fine decals etc as you can keep the paint quite concentrated but still lay down a very clean, flat line.
Like I say, it's tricky to put into words but if you try it (and you only need to add a drop or two) I think you will feel the difference, but it's a nice addition to our armoury rather than a vital one.
The water actually dilutes the paint, this can hurt the integrity of the paint film and slightly the color.
The flow agents you get chemically bond with the paint, thus adding better flow without hurting paint film integrity/color.