Re: Non-skid worn down to fiberglass
Essentially what you would need to do is paint these areas with a suitable finish (eg Kiwi Grip?) or with paint with an anti-skid compound added. Fair bit of work, especially if there is much hardware to remove, but not a high-skill job or very costly.
Finished the circumnavigation in early February in Grenada. Have to work on a book project for the next several months so the boat will be waiting for next year.