At the end of an evening in the garage I often find I don’t remember which of my chisels have been used and need a touch up. So I devised a simple system to highlight them.
I place them in their rack facing backwards.
By turning them around I know which ones I need to strop (or sharpen if use was excessive) and wipe with an oily rag before packing up for the night.
T r i a l & E r r o r 
Hey, this is really a good idea. So far I placed my used chisels in a plastik bin, but your way is much better.