Help needed with paintwork problem

[thunderlips]

I have on both the bonnet and roof of the car a lot of small black pin sized dots which seem to be embedded in the paint work. I have have tried to look into the problem expecting it to be tree sap as I used to park my car under a tree but a few people have suggested it could be artillery fungus? I have tried to remove it by jet washing the car, using a generic tar and bug spray, Autoglym Intensive Tar Remover as well as WD-40 which someone has suggested.

Finally I've been told clay barring may help finally remove the problem? I have attached some pictures of the problem for you to look at and any help on what this is and how to deal with it would be really appreciated.