Thanks for the quick response, i hope to get a photo up a.s.a.p. ....
I have had a good look at the area and the black spots don't have a body as such, i can run my finger over it and feel nothing, so i am guessing its a mold, or fungus?? to describe it better, there seems to be a grey patch on the trunk and branches with tiny black dots on it, the dots are distinctive and spreading but not joining together to form a patch of mold...not sure if any of this is helping??
I have a few Ficus bonsai that are all getting tiny black spots on the trunk and branches not on the leaves? Is this a form of sooty mould? And is there a chemical free way of getting rid of it??
Thanks for your time.