In which of the following materials might lead-based paint be found?

Lead-based paint can indeed be found in all the materials listed. Lead was commonly used as a pigment in paints due to its durability and resistance to moisture, which makes it highly effective for a variety of surfaces.

Wall paint is one of the most recognized types of paint where lead might be present, especially in homes built before the 1978 ban on lead-based paints. Furthermore, lead was also used in wood varnishes to enhance the gloss and durability of the finish. Shellac, another type of finish that was particularly popular in the early and mid-20th century, can also contain lead, as it was often mixed with lead-based pigments.

Understanding the potential presence of lead in these materials is critical for safety, especially in renovation or demolition projects. Homes and buildings constructed before regulations were enacted may still have these dangerous materials. Thus, recognizing that lead could be found in wall paints, wood varnishes, and shellac is essential for lead safety assessments and mitigations.