Heather, that article is for the most part spot on. I spend about ~50 hours a year on my decks, give or take. Best to do them in them in the pitch
of summer when the wood is as dry as possible.
While you don't need a power tool to help, it will seriously cut the time in half or more. I use a Fien Multimaster: Amazon.com: Fein MultiMaster FMM 250Q Select Variable Speed Sanding and
, along with one of these blades: Amazon.com: Fein 4mm Teak Blade - 6-39-03-201-01-6: Home Improvement
You basically need to reef the seam, which means clear out the old caulking. If you're using the multimaster, you just start cutting into it, making sure you don't knick the wood (too much) and that you get as close to the wood edges as you can. Have a razor, an auger (bent screwdriver looking thing), and a wire brush handy.
You need to get as much of the black stuff out as you can. The bond is only between the vertical surfaces, so don't worry too much about going too deep if there's a bunch way down there. If you can get it all out, so much the better.
You can put caulking tape down in the seams although this is a little complicated and often hard to do right on your first few seams.
Tape, tape, tape before you begin to pay the caulking in. Focus on the most trashed of seams; I would never try to do the entire deck
at once. Fool's errand.
It took me a few years to get really good at doing my decks, but now I can whip it out like no one's business and my seams look professional. I use Boat Life Caulk and Teak Deck
Systems (TDS). They both seem to work fine, but I try to use TDS more often.
I've made quite a few blog posts and videos on teak
caulking. Feel free to check them out, and let me know if you have any questions:
Rebel Heart - The boat and her crew - Eric's Blog