Mark,
I just used a 2" foam brush for the bulwarks. I also had all the stanchion bases and hardware off the boat, which made the sanding and painting much easier. My teak decks are in quite good shape, especially the areas that are brand new! I had to replace the line lockers and all of the port-side decking due to rot. I'd probably use a heat gun and pro-prep scraper to remove the Cetol from your decks. Why would anyone Cetol Teak Decks?! You might still need to do some sanding to even things out. Also check all the plugs and replace if they are standing proud. This is sometimes an indicator that the fastener is backing out and pushing the plug up. I really like the teak cleaner from Teak Decking Systems for making the wood look clean and new. Oh what fun!
Tally Ho!
Scott