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Originally Posted by Tirian
I found that TSP is the best grease cutter out there.
Good to prewash walls for painting etc. - Be careful this stuff can soften paint a bit. Takes grease off metal/glass/hard surfaces like crazy.
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Trisodium phosphate would be my first choice, with several precautions. It doesn't soften paint so much as it is a deglosser. Wear safety goggles and gloves, as TSP doesn't know the difference between grease on the walls and fats in your skin. Avoid contact between TSP and aluminum-they are reactive.