I've used the Z-Spar with good results. As you say, the deterioration was probably the result of being almost 800 miles to the South! Beautiful stuff once it's put on properly though. It looked like I could put my arm in the finish all the way up to my elbow! My tiller, which was covered when I didn't have a hand on it, DID last a very long time, but the crib boards, grab rails on the cabintop, and the rest of the exposed teak went quickly. Considering how much work there is in getting multiple coats on the wood, Oil's so much easier and it looks great! The next time around, I went for the oil!