That's why I stuck with the silver aluminum finish; if scratched, the natural aluminum color closely matches the anodizing layer color, known as 'Clear Coat' in the industry. This layer is only about a thousandth of an inch thick, and while harder than stainless steel, once scratched it's really impossible to repair perfectly. At the engineering firm I was with, anytime we had a black anodized part with a minor scratch, we would take a black felt tip pin and rub over the scratch. While it does not provide any protection it may hide the scratch. You may need to reapply after getting the watch wet. This procedure will need to be followed for any colored watch, just obtain a color that closely matches the finish.