A phantom chalk graffiti messenger passionate about the conflict in Gaza has struck a wall outside the home and office of retiring Whangarei MP Phil Heatley.

The wall in Deveron St and the footpath in front of the address were marked with messages such as "Stop killing children in Gaza" and "Too many lives lost" on Thursday night.

The messages were written in yellow, white and orange chalk along the wall and on the driveway and footpath.

Mr Heatley cleaned the graffiti off yesterday afternoon.

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While it was "no fun" cleaning it off, "It's far better people vent on me with a bit of graffiti than resort to the insane violence their comrades are inciting overseas," he said.

"A bit of paint versus guns and bombs speaks volumes for our democracy, our freedoms of speech and how stable we are."

Mr Heatley retired from Parliament on Wednesday after 15 years As Whangarei MP. See his valedictory speech on page 5.