What is typically used to protect non-painted surfaces while painting?

Using drop cloths is the most effective method for protecting non-painted surfaces while painting. Drop cloths are typically made from canvas or thin plastic and are specifically designed to cover floors, furniture, and other surfaces to prevent paint splatters, drips, and spills from damaging them. They provide a reliable barrier that can easily be cleaned or disposed of after the job is completed.

While old newspapers, plastic bags, and masking tape can serve certain purposes, they don't offer the same level of coverage and protection as drop cloths. Newspapers may allow paint to seep through or may not stay in place adequately, potentially exposing surfaces to unwanted paint. Plastic bags can be useful for protecting small items but not ideal for larger areas or surfaces. Masking tape is typically used for creating clean lines when painting edges or trim rather than covering surfaces, making it inadequate as a primary protective measure. Thus, drop cloths are the preferred choice for effective protection during painting tasks.