The true statement about a white vinyl eraser is: It works well for smudging.
White vinyl erasers are known for their ability to erase cleanly without tearing the paper, and they can be effective for lightening or smudging lines. However, they do not require heat to work, and they are best suited for fine details rather than large areas. The kneadable eraser, rather than the vinyl eraser, is what can be kneaded into various shapes.