If anything, more graffiti has been added.

Opposition State upper house spokesman for St George-Illawarra, John Ajaka, said it showed Government promises were "all talk''.

The graffiti covers the rear wall of Paul's Warehouse in Penprase Lane, and adjoining buildings are also covered.

Angela D'Acunto, assistant manager at the sporting goods store, said there wasn't much point painting over it "as it just provides a clean canvas for them to start again''.

Ms D'Acunto said she often saw groups of young people in the laneway when she was closing up after late trading on Thursday "and I assume that's what they are up to''.

Mr Ajaka, who inspected the site with Liberal candidate Graham Annesley, said "instead of posing for cameras, Barry Collier [Miranda Labor MP] should be taking real steps towards tackling Sutherland Shire's graffiti epidemic''.

"The shire has the second-highest rate of graffiti in the Sydney metropolitan area,'' Mr Ajaka said.

"Labor's new graffiti legislation is not only too little too late, but will be ineffective if the Government fails to provide the necessary resources to fix the problems they've created.''

Mr Collier said he had no doubt the business owner was aware of the graffiti and had chosen not to paint over it or make use of council procedures to remove it.

"Mr Ajaka's huffing and puffing is typical of the policy free Opposition,'' he said.

"Rather than sneaking across the Georges River, lurking in Miranda laneways, and attacking our hard-working shire police, [he] should be trying to come up with some policies.''

Mr Collier said Mr Ajaka and other Opposition MPs had supported the legislation in Parliament.