international also do sachets of polyurethane granules that you can add to paint of your choice. thats what i used when doing my floor mixed with bilge paint for better oil and fuel resistance and its perfect the granules arnt sharp so bare feet isnt a problem. and its really grippy.
i used 750ml of bilge paint and one sachet of granules and it done three coats on my 4.2m rib with lots to spare and touching up just blends in no problem. thats what i would recommend.