Post whitewash touch up and wash question

brown is fine,white is going to get dirty,just use your eye to what looks like enough

What did you use for your base panzer grey? Acrylic or enamel? It seems as though you had to rub too hard to get the white off. If you used acrylic it wouldn't have taken much to wear through especially on metal parts. I generally like to use lacquer paints (tamiya) as a base if i'm going to be abusing the paint a lot (as with the HS technique)

You could use some white mapping to touch it up. Just thin down some white acrylic and go back over your repainted area trying to mimic the patterns from the HS technique. You should be fine.

I too recommend a dark brown. I like van *** brown myself. It has a nice rich color that, in my opinion, has more life and vividness than say Burnt Umber. You can also use some medium/dark gray as a shadow color on the upper surfaces where you're not specifically trying to create dirt and grit but rather just a shadow. 

All paints were Tamyia,

The base was the Panzer Grey and a few lighter coats to lighten up the color.  I then sealed it with some future and I wasn't sure if i was going to od the whitewash but so I applied a wash using oil paints.  I then sealed it again with future and then applied the hairspary - (2 -3 coats).

You sure are correct,, it didn't take much to get to the metal barrel.  When gettin the white paint off (Tamyia), and since it was on the barrel, I started to rub softely with some kleenex. In hindsight maybe that was to rough...but I learned to be more patient.

You can mix Tamiya paints with lacquer thinner instead of water for your base coat color and it is MUCH more durable and has more bit. Obviously mix it with water for the HS technique but for a primer or base coat it's hard to beat cut with lacquer thinner.