Sorry for my tardiness this last couple of weeks.
When I say speckled, I refer to the specks of black pigment, not like a solid colour. Just black over-spray in speckles ??
I'm no expert on this, merely an avid learner that has made a lot of mistakes, but I keep on learning from them.
As I said above, re; the prep; steps.
For the application of the black over spray, which I think appears to be similar to a two tone effect.
To me the black appears to be a roller coated effect (?).
I would first mask off the good areas where you do not want excessive amounts of the black.
Gentle application of the black with an air brush, combined with a hair dryer in the other hand.
In effect, you are holding both tools side by side, this gets a quicker dry as well as giving the black more gloss.
You would be "feathering" the edges for lesser black.
This would be an on/off application to get small shots of the black until you get the desired effect.
I have performed similar on a green Chesterfield, however, in that case, I removed all the black from the entire cushions and re-sprayed the black over again.
Following the black would be two coats of top coat finish.
Hope you can understand what I mean, my translation is not that good at times.
regards,
Shorty.
PS ::: Roger, thanks for the pm