Ok so i tried to use advices some of you given me here on painting forums but still i don't think i like those *&(*(*) stains. Any good ideas what to do next time i will be washing a walker?;P

What's happening there is what's referred to as 'Pooling', you need to thin the wash because it's not traveling across the model. As I mentioned before a micro amount of washing up liquid will help. Also don't try wash the model all at one use a medium sized brush and just concentrate on a few panels at a time. Think of it more as applying another coat of paint.

The model does look good though. Has a really good German feel about the paint job.

Atm i'm working on removing the wash even a bit. Will see how it turns out.

Here is what I used to do with my Axis walkers:

1. Paint all with base colors (Codex Grey, Boltgun Metal)

2. Wash with Badab Black (looks shi**y after it dries )

3. Heavy drybrush (Codex Grey, Boltgun again - it looks like it is dirty).

4. Weathering with sponge (I use Boltgun Metal - looks pretty good, at least I think that).

Daniello is bang on about the sponge system, it's looks great and is real easy. Dry brushing over a wash though is going to be a lot harder for you because of the multi colour camo scheme. A good heavy matt varnish over the walker BEFORE the wash will also help.

I meanaged to remove the bad places. Now some work with the rust (can't get the right colour) and the base and i guess i will leave him for now. Will try some better washing techniques on next walkers;)

Looking much better.

That looks much better. As everyone has said watch the pooling of the washes and then highlight over them when dry to get a really great finished effect. Try some powders as well for rusting and soot effects.