Make grease stains invisible behind the hood

The wallpaper behind our hood had constantly grease stains, because on the side slits the exhaust comes out and adheres to the wallpaper. What have I scrubbed and repainted, nothing really helped. Yesterday we bought a thin stainless steel plate, let it cut to fit and clamped behind the fume hood.

Grease stains away and easier clean I get it now too. Who also has these problems, that may have helped with this tip and it actually looks quite nice, I think.

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