Damn! Just found a small (1 inch round) paint bubble.
It's at the bottom of a slide ... in the molding piece. The caulking above it appears great, but I just pressed hard on the bubble and a small squirt of water and air popped out of tiny pinhole.
Obviously, I will seal the pin hole, but thoughts on if I should do anything else? My guess is it will cease to expand or worsen once I seal up the pin hole.
I guess I can't complain on a 10 year old 45 foot coach ... a single, one inch bubble in a plastic trim piece isn't too bad.