Rick,
As we continue to get the deck down, will you save any scrap that you have? Preferably any pieces that have the outside surfaces and that are at least 6" long. The reason why is that I'm going to run several tests on the wood's ability to hold paint...or not hold paint as the case may be. I'm going to test out several different kinds of paint, including a two part epoxy paint that's guaranteed to stick to anything. I'm going to paint several pieces with several different brands, leave them outside, and see if we can get one that holds. Teak is almost the same density as Brazilian Purple Heart. If they could get lead based paint to hold, we should be able to find an alternative.
Correy