Turning a cheap steam espresso machine into an electric steamer?

I just won a bid for a no-pump steam-based espresso machine (Salter EK3131) and I plan to experiment with it as a dedicated milk steaming device. I figure that with a 240ml boiler and an 870W heating element it should be able to steam milk reasonably well. I could be wrong, but for the 25 GBP I paid for it

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