Lack of gloss on the painted surface can be caused by several factors:OxidationScratchesLack of a Protective CoatingOxidation is the dulling of the painted surface that occurs when the sun’s ultraviolet rays deplete the paint’s natural oils and resins. Scratches prevent light from reflecting uniformly, which limits gloss. In order to restore gloss, the oxidation and scratches must be removed.Once the surface is free of oxidation and scratches and any swirl marks caused by compounding are removed, a wax or paint sealant should be applied. It will protect the paint against further oxidation, level the surface and intensify the reflection of light.