I refinished my worn, molded non-skid area with
Kiwi-Grip. The molded surface had developed many small, no permeable hairline cracks. Originally, I intended to paint the deck with a thing primer coat to fill the crazing like cracks, before painting over with a nonskid style paint. However, after a little research I took the Kiwi-Grip option. The water based product is rolled on fairly thick, covering all the molded surface dimples as well as the cracks, then a special texture roller is used to easily create the non slip surface to whatever level of aggressiveness is desired. High traffic areas can be touched up easily by just rolling some more "goop" on worn surfaces as needed. That said I've needed very little extra maintenance since I applied the original 9 years ago. It's an easy, cost effective solution that will give your older boat an impressive face lift. Btw, it is certainly DIY friendly. Lots of YouTube vids on the product.