This is the first time I have received a pleasing comment from a reviewer. It is the fruit of the sacrifice of energy, mind, and research grant, especially for sample analysis using X-ray Photoelectron Spectrometer in a large number of samples. This research has been carried out by my Ph.D. student for more than three years. This paper is now accepted for publication in Progress in Organic Coatings. Farah Syuhada Halim, congratulations!