Which sandpaper is of the best quality?

The best sandpaper is often that which is specifically tailored to your project needs. For finer finishes, it is best to choose sandpaper with a higher grit value (e.g. 240 to 400), while for heavier sanding, a lower grit value (e.g. 80 to 120) is more effective. Brands like CROP are known for their high quality and durability, so it pays to invest in them for optimal results.