Hi,
thanks for the comments!
How I made it:
Basically it is a mix of the "Marmite technique" and the alcohol technique applied to powders.
For the "Marmite technique" (in order to get the chipping) i used honey, as in Italy you can't get any Marmite
for this very subtle use of food see here:
http://www.dakkadakka.com/wiki/en/Marmite_Weathering_MethodFor the "Alcohol technique", this is a veeeery short tutorial:
Basically I need something that doesn't drip/ooze, but stays in place. This is beautifully achieved by Vallejo retarder, but it takes ages to dry, and I must wash my model so many times I can't wait that long. So...
I put some coloured powder (not pigment, it's just a powder, soft like flour, I buy it in my colour store) in rubbing alcohol, and wash the white-primed model with that.
I get it dry with hairdryer, then do it again and again with different hues/mixes.
Now, since the alcohol doesn't "glue" the coloured powder to the model, you can brush it away from areas you want to be lighter. You can get this with a toothbrush for a gritty look, or blend it away with a alcohol dipped brush.
You're over. Remember to use some blue-green and some pink for underwater atmosphere.
@ sangennaru:
man, I'm so bad with bases... you should do the job