I didn't catch a deck leak until it started weeping thru a screw hole in teak trim inside the cabin. It's a 14' long piece of 2" solid teak about 1/2" thick, I sanded and it looked OK until it got damp from the fog last night. It's a dark spot the size of your thumb right at eye level, so the question is: keep sanding or try to bleach the spot or take my OCD meds and just varnish and call it "character"?