I'm sure it works with Elements as well, tomkin. I read it somewhere when i was doing a search.
I might try it later. I recall applying a grey mask over one of the channels and then brushing out the little white star type marks. Then, lo and behold, the nasty pattern would be gone (or almost). I think it was George who told Pels and me about it originally (not Sioras - forgotten his RC name*)
*miagre1
(I'll PM him and link to this thread - he's good at doing stuff like this. )