I have put a coat of Cabot Mahogany Flame Australian Timber Oil on my newly built PT deck. It states to only put one coat on but a test area that I put a second coat on looks much better (not dull looking). I have also been told that I can put a water base clear coat over the Cabot. I hate to brush on a second coat of the same stain as the deck is 1500 sf. Any suggestions on clear top coats. Thanks!