Want to apply as a covered decking sealant. I've painted it with waxy sealant from HD then wanting something more durable, painted with marine grade oil based enamel two years later. Three years since the enamel needs to be rough sanded to remove brittle flakes on outer edge, your sealer applied but as a flooring in Texas White is too revealing, gray is pretty bland and black would be revealing as well, probably scary at night walking across thirty feet of darkness.