Turtle Wax
Dick,
I used to park my suburban in a certain spot at work until I noticed the same type of small black dots. They are gooey when they first hit but then they harden and turn darker in color. They seem to come from a tree, the type I don't know offhand but I can find out.
Turtle wax "Bug & Tar Remover" seems to work the best, at least for me. There is still rubbing involved but the T wax softens it and makes it easier to rub off.
Now, the bad news; you say that there are thousands of spots. That's not good. Good luck, sounds like you've already put quite a bit of effort and time into it.
CZ
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