His artistic approach favoured technical precision over the flamboyant flourishes common in the Rococo movement. Bannermann used a disciplined engraving style that translated oil paintings into crisp, black and white lines. His works often feature structured frames and clear typography, which provide a sense of order. This methodical technique ensured that the likenesses of historical figures remained legible and dignified.

Modern collectors find value in the archival quality of these prints. They offer a window into the Georgian fascination with the past and the desire to categorise artistic achievement. The formal compositions work well in study spaces or hallways. Because they avoid excessive ornamentation, these engravings remain compatible with minimalist or traditional home offices.