A would-be carjacker in Melbourne's east has, police say, resorted to an unusual face covering to disguise himself - a Chux Superwipe.

The man was wearing his makeshift mask when he approached a woman who was sitting in her white Mercedes Benz while parked at Mullum Mullum Reserve in Donvale about 1pm on Sunday.

A facefit of the would-be carjacker who covered his face with a Chux Superwipe. Credit:Victoria Police

He was carrying a crowbar and demanded the woman get out of the car but when she kept refusing he eventually ran away towards the intersection of Springvale and Reynolds roads.

As well as the Superwipe the man was wearing a dark beanie, black long-sleeved top and light-coloured pants.