Painting: What is the best way to stain or seal new garage doors that are made of cypress...and how do I keep them looking new? Dan's of Central Florida,... on Apr 03, 2011 Hi Michael, ...» Sand them down and re-stain them. You can use a product by Minwax called Helmsman Spar Urethane for a protective finished. It is specially made for wood that is exposed to the sun and elements.
Sand them down and re-stain them. You can use a product by Minwax called Helmsman Spar Urethane for a protective finished. It is specially made for wood that is exposed to the sun and elements.