Nice sign. id clean it with easy off and a plastic scrubby. Lay it on the grass,(in the shade) spray on a good thick coat and let it set for 8 hours or a little more. Scrub it. Rinse with the garden hose. i think you will be happy with how it comes out. if there are stubborn spots, repeat in those areas.

Last edited by JimT; Tue Sep 05 2017 02:23 AM.