Last year I painted the deck of my Grady White with an Aliphatic Polyurethane paint that was said to be bullet proof. The deck was sanded removing all blemishes, wiped down with MEK and paint rolled on. 6 months later I started getting stains from fallen leaves, bird droppings, pollen, fish blood, none of which would come up. I used EVERYTHING. Bleaches all the way to paint thinners. Apparently these stains actually penetrated the paint. <br />Did I use the wrong type paint for the deck?? I sure would appreciate some advice. I don't wish to mention the brand or supplier of the paint because they have tried to help with no success.<br /><br />Thanks for your imput.