The lines visible on the acrylic and timber images are to showcase how engraving will appear on the material.
Toppers can have minor laser charing in particular timber toppers, this comes with the territory of laser cutting & engraving acrylic & timber and is not considered a fault. This also includes imperfections on matte finished toppers as the matte finished is achieved by spray painting clear acrylic. The paint can also get scratched so care is needed when handling the matte finish toppers.
Please note that actual colours may vary than what is pictured due to the calibration differences between monitors/tablets, smart phones etc.