In my Tsushima diorama, i had to apply the rust on a white paint -this went quite smoothly, but if I had to apply the rust on a black or dark coloured ship the things would have been different. I have been observing the fences near my home and it seems that before attacking the metal, the rsut, first discolour the paint near the rust's borders. So here's my discoloured green mix; I added some yellow for the discoloured areas that will be situated in full sunlight.
I use the same technique for 15 years! first I roughly mix black and leather paint with a bit of water -quite a bit in fact, the mix is pretty liquid, then i apply the dark mix precisely where the rust will be. then, when the paint is still wet, i blend some leather coloured paint unevenly on the top of the mix. then -with a paint still wet -I load some pigments on the brush that i dried more or less with a tissue, and i lightly touch the surface. The trick is done!
To prepare the rust, i need some pigments (Windsor & Newton) as well as '"leather'" coloured paint + black. I use Vallejo. I also need the top of a DVD case, why? because when you mix your pigments you tend to blow a biot of air here and there, and the borders are here to help you not to tint your working surface. the colours are: yellow, red, van dyk brown, black, sienna and burnt sienna. i try at each diorama not to use the same ratio -sop this time i went high with sienna and Van Dyk Brown + quite a bit of red for the highlights.
One day late compared to what i wrote, sorry for this. Time to explain something about this diorama: i want to create some light effect a bit comparable to the one I did on Koktebel -which means, a sundown, which will tint all the colours from one specific angle. The picture below is pretty carricatural of course as the '"other'" side of the gun is certainly as a work in progress state, but yet, most of the side that won't be bathed by the sun will appear *a lot* darker, with very few high highlights etc. I have been sitting in my garden quite a bit these past days, looking at what the sun was doing at sundown, and it certainly tints the green in a very beautiful shade. Oh well, maybe it will end in the dustbin too. that won't be very easy to paint each element according to the position of the sun, and to set the shadows of each object according to all the other objects etc etc.. But then I could also do the same diorama over and over again, but I won't :) btw, I have been adding a *new* diorama in the galleries, it's called '"The Abbey'", and is from 1994/1995..
That's right! Ugly Citadel inks! I need some deep highlights on some special part of the green so I made an extra screening on the high highlights using a diluted mix of yellow and green. Believe me the whole colour starts to shine this way, so you want to be careful while using them -better 4 successive inks screening than a big one. It does a very nice shiny metalic feel about the whole, quite pretty :) Actually, the trick with citadel inks... I painted for some time some citadel stuf when i was a teen. At some point I got fed up of working alongside a trademark so I stopped and tries to forgot what i had learn there which was a very stupid idea. *inks* and how to use them to make shine the colour underneath was certainly the best thing I learned there. I have also been using some inks to make the bolts stand out wherever there is some bolts on the diorama :) Tomorrow, more tricks and the completed green parts -ready before the rusting!
Okay, as you can see from the picture, I used only 3 colours for this, I blend them, and I apply them as a not much diluted screen on the parts that would normally stand out as highlights if being drybrushed. That's it in fact, i never do any real drybrush on my models because the effect is too hard and visually quite crap.
The black run offs on the contrary work pretty well after a single apply. Just wet (not too much) the right place and then -with a steady hand- just draw with very few diluted paint the run offs -the fact that ythe surface is wet will diffuse just a little bit the black paint; And then you can retouch or erase the run offs using your brush.