For an antifoul we use copper coat which is a fantastic hard water based epoxy with copper dust in it. It’s good if you enjoy swimming and giving the bottom a scrub every month or so. Its hard and very smooth so is good for performance based boats as it gives the hull better efficiency through the water and the difference between it and an ablative is noticeable. We use plastic scrappers for anything hard and black foam sanding pads to give it a really good clean and to burnish the copper coat which helps reveal new copper to the environment and protection to the hull.