Hey mate,
I've been doing a lot of rock spinning and live baiting on the northern beaches in the past month, using metals of all sizes, chug poppers, skip poppers and minnows.
My best bet is the poppers, metals don't seem to be doing it at the moment but I've caught three mid sized kings in my last three sessions, all at different times of day (one at midday) on chug poppers. Specifically, the new saltist version that looks like a pilchard and a yo-zuri one that looks like a slimey.
Find a nice safe ledge with a good wash, most of these are frequently fished and talked about, so it wont be hard. If you fish the ledge regularly you will work out when the most productive times are. I fish my best ledge on a low in the afternoon, as this seems to be a more productive time by a long shot.
Good luck mate, Bobfish