Why does a car appear shinier after it has been polished?

A car appears shinier after polishing because the polishing process removes minor surface imperfections, such as scratches and swirl marks, which can scatter light. By smoothing the paint surface, polishing enhances the reflection of light, making the surface look glossier. Additionally, polishing often involves the application of wax or sealants that further enhance the shine and protect the paint, contributing to a more vivid and reflective appearance.