"Why, she works at a Nail Salon, Watson..."

Attention Mystery writers!
I had a total Sherlock Holmes moment yesterday at the nail salon that I thought I might as well share, and that is this:
Nail Salon employee's have very distinctive nails.

*Their feet are always impeccable; they tend to wear flipflops in the coolest of weather, so as not to smudge their toe polish which is reapplied frequently and flawlessly, sometimes with rhinestone adornment.

*Their HANDS, however are usually very plain and always bare and devoid of polish. Their cuticles are trimmed, and their nails are neat and somewhat dry and yellow owing to (I assume) frequent exposure to polish remover.

*The thumbnail of the DOMINANT hand is curiously flat and the underside of the thumbnail is always spattered with many colours of polish. This is because, when their clients' polish tends to pool near the nail bed, they will correct this with a quick application of the thumbnail. This happens so frequently, that they almost never attempt to clean the polish, possibly that at some point it is assumed it will NEVER come off.

Possibly not important, but there if you need it.