One of the main reasons for the reduction in the service life of metals is the low adhesion of protective coatings to metal surfaces, which does not allow forming the required level of performance indicators for reliable protection of metals. As a result of a detailed theoretical analysis, it was found that the solution to this issue is possible due to the improvement of the technology of preparing metal surfaces for painting using nanomaterials. One of the greatest attention in the development of this solution was paid to such a nanomaterial as carbon nanotubes. The use of a suspension based on mixed solvents and carbon nanotubes in the technology of preparation for painting allows obtaining coatings, in comparison with traditional ones, with up to three times greater adhesive strength, one and a half or more times better abrasion resistance and resistance to deformation effects, up to two times more antistatic, and also with greater thermal resistance and thermal stability (the temperature transition point to the destructive state on the thermomechanical curves is 100–150 ˚C higher). The improvement of the coating properties occurs due to the formation of a uniform dense intermediate layer between the metal and the coating, providing increased adhesion and other quality characteristics of the coating, due to the process of chemisorption with the metal surface due to the excess amount of electrons on the surface of carbon nanotubes, as characterized by the results of the electron microscopy study.