![Aircraft mechanic here. How do I get these black residues of the outline of my nails? I DO shower after work. lol. I've also washed my hands multiple times after changing main Aircraft mechanic here. How do I get these black residues of the outline of my nails? I DO shower after work. lol. I've also washed my hands multiple times after changing main](https://preview.redd.it/aircraft-mechanic-here-how-do-i-get-these-black-residues-of-v0-f8lcwlrom9u81.jpg?width=640&crop=smart&auto=webp&s=3492dc40fd0535857b2ac4e3b6ce241c7b24dead)
Aircraft mechanic here. How do I get these black residues of the outline of my nails? I DO shower after work. lol. I've also washed my hands multiple times after changing main
![Car Mechanic Cleaning His Hands After Work Stock Photo - Download Image Now - Mechanic, Cleaning, Lubrication - iStock Car Mechanic Cleaning His Hands After Work Stock Photo - Download Image Now - Mechanic, Cleaning, Lubrication - iStock](https://media.istockphoto.com/id/500295910/photo/car-mechanic-cleaning-his-hands-after-work.jpg?s=1024x1024&w=is&k=20&c=5RHQeKcaUR_1M81hJxeOG9ca_sqsbhBTMaT1TolhpgI=)
Car Mechanic Cleaning His Hands After Work Stock Photo - Download Image Now - Mechanic, Cleaning, Lubrication - iStock
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