Working on a '30 Model A Coupe, but this question may well pertain to other cars of that era. I'm an amateur working with simple tools, so if this is a stupid question, forgive me. I was prepping the body yesterday for some Por15, rinsing off one of the prep chemicals, and then compressed air blowing it dry. The gutters are in good shape, but I noticed that water gets in behind the gutters, as they are apparently only spot welded to the body at short intervals for the entire length. Not a lot of water, and not a big problem, but I'm wondering if I should caulk or seam seal just a little in the crack between the gutter and body. I've never heard this mentioned - maybe because it's so little water that it's a non-issue. On the other hand, since I can't get behind the gutter to properly prep and protect from rusting, I'd think best to keep water out if possible. So, do you think I should 1. Put a very small (barely visible) bead of seam seal or paintable caulk along the top edge of the gutter? Or... 2. Just slather the peewauket out of it with Por15 so it runs in behind the gutter? Or... 3. Other suggestions? Or... 4. Ignore it because it's just not that important? Thanks for any advice or experience.