Alcohol wash ratio?

I use a big brush and apply as much of the solution as it'll hole till the model is soaked then it'll dry. After that I might touch it up a bit with some pastels. But as far as drying time let it sit over night so it'll set and won't mar the paint.

So you place the whole model in a container of alcohol/pigment? How long does it soak for? What pigment do you use?
[Sorry for alll the questions but this is my first wash and i have no idea what I'm doing! Yet! LOL]

I'm still experimenting with soaking the model and useing an air gun to apply around 6-9 layers of wash.

Soaking it leaves deposits of color where you'd least expect ( a good way ) and the air gun leaves a subtle layering of grim look to it.

here's an example of my soaking:

It has a pastel wipe down after the wash for the road dust look.

No water? Do you brushe it over the entire model or just the seams and bolts?

I use like a 95 % alc to 5 % pigment