**4. Conclusions**


**Author Contributions:** Conceptualization, P.K. and R.P.; writing—original draft preparation, P.K.; design and implementation of processes, tribology, R.P.; SEM and EDS research, A.R.; review and editing, visualization, literature, S.P. All authors have read and agreed to the published version of the manuscript.

**Funding:** The work has been done under Measure 1.2—Sectoral Research & Development programs of "Program Operacyjny Inteligentny Rozwój" 2014–2020 (Smart Growth Operational Program 2014–2020) co-funded by European Regional Development Fund. The project: "Gradient low-friction coats produced by means of a hybrid FineLPN process, nanostructured with MoS2 and rGO particles for use in aircraft sealing." Contract Number: POIR.01.02.00-00-0011/15 (NIWAG).

**Conflicts of Interest:** The authors declare no conflict of interest.
