Improve your paint's application and finish with marine paint additives from Go2marine. Penetrol is a popular oil-based paint conditioner that reduces brush drag, minimizes brush marks, improves flow, and helps paint penetrate and bond to marine wood and metal surfaces, making it significantly easier to achieve a smooth, professional finish. Go2marine carries Penetrol and other paint additives to improve your results on topsides, woodwork, and metalwork projects. Browse our collection online.