The Tear-Aid is amazing on rigid surfaces. I had a test strip on the hull and after 4 months had to really work to remove it.
It's a little different story on fins though. As I mentioned in the earlier post, I recommended it for up to about 10 hours of use. Eventually it starts to lose its grip on the corners. Here's what it looked like after about 60,000 flexing cycles:
When I finally removed the tape from the fin, it was again very difficult getting it off where it was undisturbed. So give it a try but you may need to replace it (or trim it) from time to time.
When it comes to fin toughness, standard fins have the best resistance to damage. But as with tires, one can get performance or longevity, but not both. The new fin material is a huge improvement though.
I hit a concealed clay bank in muddy waters over the weekend and came to an instant halt -- had to extract the Drive to free the boat. But after a little de-mudding I was back in operation and on my way again -- straightened the mast later. Frequent mast bends can be annoying, but designating the mast as the sacrificial piece is really a good design alternative to breaking the Drive or boat. Not only is it less expensive for an occasional breakage, but one rarely looses operational function with a bent mast and holey fin as opposed to a broken Drive or cracked hull.
So until Hobie comes up with the extra shallow 4-finned Drive, keeping spare masts and fins is probably a good idea.