A sex shop worker has been sprayed with petrol during a robbery in Melbourne's east, just days after another adult entertainment shop was targeted by thieves.

Two men entered the adult entertainment store on Scoresby Road, Bayswater, around midnight and demanded cash, police said.

They then sprayed the 45-year-old woman working at the shop with fuel.

The men stole cash before fleeing on foot, investigators said.

The woman was not injured.

On Sunday morning an adult entertainment shop in Moorabbin, in the city's south-east, was also robbed.

A man wearing a balaclava and stockings over his head used bolt cutters to get through a fire hydrant and a fence to get inside.

He stole a life-sized doll worth $4,500.