A perspex screen has been put up around the street artist Banksy's latest mural in the Taibach area of Port Talbot.
The screen was fitted for free by a local businessman.
The owner of the garage used by Banksy as a canvas has also hired a security firm to protect it from vandals.
Ian Lewis, a steelworker at Port Talbot's Tata Steel plant, said he has not slept properly since the artwork - which shows a child playing in the falling ash and smoke from a fire - appeared on his hand built garage earlier this week.
"It started off as fun, but now it's gone to stress", Mr Lewis said on Thursday.
"It's down to not sleeping, but now I've got the security there it's taken that weight off me."
Banksy claimed responsibility for the new artwork on his website and Instagram account on Wednesday after it first appeared on the side of Mr Lewis' garage on Tuesday morning.
People visiting the site told ITV Wales it was "a pity" the mural needed to be protected.
It's a shame that they've got to put up protection...just shows the world that we live in.
It's a shame that you can't do something like this without people trying to spoil it, but on the other hand, it'll protect it for years and years to come.