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.
Heading back to Lake Ontario for this summer. Relatively few stops along the way from Grenada. Martinique, Guadeloupe, St. Martin (must have something to do with the French food), then Bermuda, New England and up the Hudson/Erie Canal. We were going to go via Newfoundland and Labrador but June remembered that one of the kids is getting married this summer - details, details!