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.
In South Africa doing lots of boat stuff. Departure north from Cape Town around December 15th. Arrival in the Caribbean around the beginning of February, after 5300 miles or so.