With just 10 days until the sinking of the ex-HMAS Adelaide, protestors have drummed up support at Terrigal Beach.
The former warship is set to be scuttled 1.8 kilometres off shore, to create an artificial reef and dive site.
But the No Ship Action group maintains the vessel has not been completely cleaned of lead paint, which they claim could leach into the ocean.
The demonstrators pounded on 15 large steel drums, representing the alleged amount of toxic waste that will go down with the ship on April 13.
The grim reaper also made an appearance, with protestors claiming their beach could die if the scuttling goes ahead.
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