Hello HwGregg8,
Thanks for choosing the Apple Support Communities. These look like marks from dust or debris from your keyboard. They should be easily cleanable. Here is how to clean your MacBook Pro.
How to clean your Apple products - Apple Support
"Apple products are made with a variety of materials, and each material might have specific cleaning requirements. To get started, here are some tips that apply to all products:
- Use only a soft, lint-free cloth. Avoid abrasive cloths, towels, paper towels, or similar items.
- Avoid excessive wiping, which might cause damage.
- Unplug all external power sources, devices, and cables.
- Keep liquids away from the product, unless otherwise noted for specific products.
- Don't get moisture into any openings.
- Don't use aerosol sprays, bleaches, or abrasives.
- Don't spray cleaners directly onto the item."
"Learn how to clean your Mac laptop computer.
MacBook, MacBook Pro, and MacBook Air
When cleaning the outside of your MacBook, MacBook Pro, or MacBook Air, first shut down your computer and unplug the power adapter. Then use a damp, soft, lint-free cloth to clean the computer's exterior. Avoid getting moisture in any openings. Don't spray liquid directly on the computer. Don't use aerosol sprays, solvents, abrasives, or cleaners containing hydrogen peroxide that might damage the finish.
To clean the screen on your MacBook, MacBook Pro, or MacBook Air, first shut down the computer and unplug the power adapter. Dampen a soft, lint-free cloth with water only, then use it to clean the computer's screen.
To clean hard-to-remove smudges or fingerprints on the display or exterior of your Mac, you can use a cloth moistened with a 70-percent isopropyl alcohol (IPA) solution to gently wipe the display or enclosure of your Mac laptop.
MacBook Pro models from 2016 and later with Touch Bar and Touch ID: Clean the Touch Bar and Touch ID (power button) on these computers the same way you would clean the display. Shut down your Mac and unplug the power adapter. Dampen a soft, lint-free cloth with water only, then use it to clean the Touch Bar and Touch ID.
MacBook (13-inch, Late 2009) and MacBook (13-inch, Mid 2010): The bottom case of these computers uses a soft nonslip material. Use a 3M Gray Microfiber or soft dye-free, lint-free cloth to clean the bottom case."
We hope this helps.
Cheers!