Can u please tell me some tips for weathering a model only with brushes cause i havent got a airbrush and only the hell-expensive revell colours!
thx!

Can you give some more hints about what kind of base (acrylic or enamel) your Revell colours are? This will help focusing the answer...
Ciao

the normal tins i think its enamel

Usually I do all af my weathering with the only aid of paintbrushes. What I usually do is:

a) to give over the enamels a coat of acrylic gloss varnish in order to:
- helping decal application (after decal application seal the decals with another coat of clear transparent acryl varnish - you can use a spray can you can buy also at supermarkets)
- helping a wash to flow better into recesses/crevices
- helping the enamels not to be attacked by the wash/filter (if this is enamel based too)
b) then I give a selective wash with a mix of black and dark brown thinned at 80/90% at the base of the raised details and into the crevices/recesses of the model
c) once I'm happy with the result I give another coat of matt transparent acrylic (always from a spray can always bought at supermarkets) in order to:
- seal the previous effect avoiding it to be attacked by the further weathering
- have a good base for a filter
d) if I have to change the camo colour tone (or blend the camo pattern colours) I give a filter (paint thinned at 95 to 98% ratio ending in a kind of dirty thinner) an all of the model
e) then I go for the dry-brushing of the raised details with lighter shades of the camo colour(s)
f) finish the model weathering with pastels/pigments application
I hope that this can help...
Ciao

yeah thx, this was a big help but ive never did a wash or something like that
I applied the decals yesterday and painted a coat of varnish (revell color nr 2 ) on the model.

Unfortunately I have no experience at all with the Revell colors...
An excellent alternative to the acrylic gloss transparent spray can is Future floor polish from Johnsons. Here in Italy is not marketed, but in the UK is marketed under the name "Klear". As far as I know it is available in the Benelux as well, but I do not remember under what name. It can be applied very easily with a paintbrush and with a couple of euros you get half a liter of it!!!
Ciao

Thx but i think its not avialable (i hope i wrote it correct )here, is it like pronto wood varnish to polish things?

No it isn't. It comes in a transparent bottle and looks like a transparent liquid...
Ciao

it should be called klear over there it is a type of varnish for floors any of your big supermarkets should have it in ther cleaninig isles or just buy some clear matt/satin varnish in a tin from a diy store

what is drybrushing?