I have been debating over the last couple of weeks on weather I should weatherproof the tops of the cemertary columns with satan spar urethane. I live in the pacific northwest and will be putting them out two weeks before halloween. They are sealed with caulk and painted with outdoor latex paint. Should I leave them or use the urethane? My concerns with the urethane is discoloration and if I need to repaint them someday I would have to sand the urethane. So what do you guys think?