Sherman Williams makes a two part tile clad paint that works great, says for offshore use etc on the back of the can. We have used gloss white and one tinted grey, some going on 5 years ago now.you get 2 gallons that mix 1 to 1 for around 100.00, plenty for the 31 cats and 35 formula all having twins with touch up left. Brush on application, prep by da sanding and wiping with thinner or acetone. Good Luck