Can I use caustic soda instead of sugar soap to clean my walls before painting?

While caustic soda (sodium hydroxide) can effectively remove grease and grime, it's a highly corrosive substance that can damage surfaces and is not recommended for cleaning walls prior to painting. Sugar soap is specifically formulated for this purpose, as it cleans without risking damage to the paint or wall material. For best results, stick to sugar soap or other paint prep cleaners designed for the task.