Magic Wash

Finally trying the magic wash thing. A few 
questions:

What ration of magic wash stock (1:4 
future:water mix) and ink should one use? (I 
find inks seem to be very strong, so I'd assume 
something dilute?) And similarly, what ratio with 
paint? (some ballpark guestimates or "this is 
what I do" would suffice)

Also, I heard you can add a drop or two of  
dish detergent to good effect. Though I forget 
exactly why - surfactant? Or do I misremember?

Also, lastly, I've heard it suggested you should 
use a separate brush for it. Why? If you wash 
your brush with soap and water after the fact, 
why would it matter? (I ask because I'm loathe 
to write off one of my sable brushes to this mix 
but I do want to try it out). 

I'm painting ESU Heavy infantry. I have painted 
them in an autumnal camo pattern. Only one 
worry - if I wash brown, it'll probably sit int he 
grooves on the quilted coat. Not sure if that will 
look bad on top of the camouflage colours or 
not. Have to try it on one and see. 
PPS - Colour scheme:
OD green base (Tamiya)
Hell Hound Brown splotches 
Yellow 06 Armouries paint splotches (have to 
find out what the actual colour of this is!)
Some packs and high boots are Minotaur 
Brown. 
Khaki Drab for chest mag pouches, ruck, and 
webgear (Tamiya)
Sun tan, Asian, or other related shades for 
flesh. 
Drow Flesh for KI-72 AR and the SAW. 

Will post some pix to stargrunt.ca (warning: I'm 
no amazo-painter, so I don't expect them to 
rival Mr. Cho's photos, nor those of the likes of 
the Great Ghostly Crimmins and his ilk). But 
they'll be serviceable for wargaming. :) 
---------------------------------------------
Thomas Barclay
Co-Creator of http://www.stargrunt.ca 
Stargrunt II and Dirtside II game site

No Battle Plan Survives Contact With Dice.
-- Mark 'Indy' Kochte