Hmm...all over you say...

May be small caterpillars - are there white butterflies hanging around? If so pyrethrum should have fixed it but remember that phrethrum is a contact spray so if it doesn't tougch them then it doesn't work. Or could be one of the nasty lady beetles (we don't get any here so I don't know much about them)

You could try something like white oil.

Sorry that I can't be more help