On a base finished with gloss clear apply, with a very fine brush, a tiny point of paint undiluted subsequently "pulls" the color with a dry brush or lightly moistened with thinner until reaching the desired result and then you seal the color with a second hand lens (this time opaque).
Carbothello I have pencils whose soul is made of a material midway between charcoal and lead pencil. They are available in stores materials for fine arts and are available in 60 shades , including many lands and many gray (hot and cold).
The huge advantage that these pastels allow the model - especially for those who work with very small scales such as model trains in N, or 1 / 72 in plastimodellismo - is the extreme precision and ease of use of the instrument and determination of the product.
To make a casting, in fact, just make a section on the model surface, with a light hand, then with a stiff brush, dry it go the distance (with dry-brush-like motion) vanishing at will. Colors can be easily stacked together.
process, prealtro is totally reversible if the job does not suit, the section can be completely removed with a Q-tips moistened with plain water.
The only care is to apply the pastel on a strictly opaque.
the purpose of constructing buildings ATSF-Route 66 and the aging of carts and place, I wanted to try this technique using as a model caburanti deposit that I made recently for a module shudders. The idea is to apply rust dripping on the walls of the tanks.
For the test I've got (relatively easily) with a dozen pastel shades of brown and gray.
and a swab for decoupage stetole with short and stiff (can also go to a traditional brush must be cut in the terminal resistor side of the bristles)
To reproduce the effect of casting, I applied a first base of Light Ochre (code 685) over a large area
then blend with the swab
to which I have superimposed a second fine line of Burnt Umber (code 625) but also shaded with a lighter hand
The small dark spots (Bister made with cod. 635) simulating the rusty spots giving rise to the leakage.