Finish on wood floor wearing out

I had my hardwood floors done with Moisture Cure 7 years ago and it has held up beautifully except for two spots: one where my computer printer wheels pull in and out and the second, under one dining room chair.
Is there a way I can put something on these spots to protect the wood that is now raw?
Thanks, Fraida
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.