Now you start working from the background to the fore and brush in to the still wet paint one or at most two shades. Use only that much area which canbe scumbled for the next two hours. Otherwise the paint will be too viscous to work with. Again the paint layer should not be too thick.
Sometimes you need x-time the amount of paint for scumbling to prevent further interweaving. Otherwise the appeal of glaze, luminosity and multicolour effect in the tiniest of spaces will be lost. The size of the area to be worked on will differ depending on the number of details/shades scumbled. White is preferred to brighten lighter areas.
Use a small brush and scumble white to the colour already applied.
The brush will take up colour. Therefore, do not use this brush to
go back to the area to be intended to stay lightest.
Before picking up white again, briefly clean your brush with a rag.
Do not use paint thinner for this purpose because the brush will be
too wet and will thin the paint.
Now use a somewhat larger, still clean brush and scumble the paint
cross-wise in the direction you like for blending or edging.
When you want to darken or lighten any areas of wet paint, always
start with the darker shades.
The likelihood of even a tiny bit of white creeping into the area to be darkened will defeat your intentions. Rather wait and scumble again the by then dried layer. Some areas will not need more than one layer. Others will have to be retouched several times. There is no need to become impatient.
The areas to be retouched must be sufficiently dry as not to create
any “pinholes”. If one area overlaps with another of a distinctly
different colour, at this painting stage, the back area has to dry
first before working the fore to achieve distinct definite delineation.
In this manner, you are slowly getting closer to finishing your painting.
The entire painting should dry out completely.
This will take at least one week.
As paint has been applied very sparingly this should be sufficient time.