I think you will b fine with the broom finish. Thts how r driveway is and it's not slippery. In my opinion theres more pro's than con's going with concrete. Seen one on the web before tht was like the kids say now EPIC. NOT MY PICTURE TOOK OFF THE WEB.
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The people who say I can't do it can just sit the @^#% down and watch me. Friends call me Rusto I also subscribe to pond boss mag. http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=504716#Post504716