The artist focused on the anatomical precision of the male nude. His drawings, such as Zittend mannelijk naakt, op de rug gezien, demonstrate a clear understanding of musculature. He used chalk and charcoal to define the contours of the body. Van de Wart also produced formal portraits, including studies of Carel Wouter Visscher and Abraham Valentijn. These works avoid unnecessary ornamentation. Instead, they rely on strong draughtsmanship. His Zelfportret reveals a similar directness, presenting the artist with a sober expression.

Modern collectors value Van de Wart for his technical discipline and the sculptural quality of his figures. His academic studies of the human body fit well in contemporary interiors. The sketches of drawing tools in Vignet met teken- en schildergerei offer a glimpse into the physical process of 18th-century art production. These prints provide a sense of history without being overly decorative. They appeal to those who appreciate the foundational skills of the Dutch Neoclassical movement.