What is the result of using dope over paint or enamel on a surface?

Using dope over paint or enamel can result in the dope dissolving the underlying materials. This occurs because many types of dope contain solvents that are aggressive enough to break down the chemical composition of the paint or enamel beneath them. As the dope is applied, these solvents can penetrate the paint layer, effectively dissolving it and causing issues such as bubbling, lifting, or altering the finish.

This characteristic of dope is important to consider when finishing aircraft surfaces, as it can compromise the integrity of the paint job and lead to surface defects. Therefore, it is generally advised to ensure that surfaces are properly prepared and compatible coatings are used to avoid these adverse effects. This understanding of chemical interactions is crucial for maintaining the aesthetics and structural integrity of the aircraft's exterior.