Has anyone seen rust on their Odyssey?

I had the dealer do their rust protection
with annual inspection. But now I've noticed
the welds on the rear hatch have spots of rust.
When you lift the hatch this is above your head.
This surface is about 1.5" wide and normally horizontal.

Also I notice rust on some welds on a vertical piece in
the rear door on the drivers side. Only noticeable when
the door is open and you are looking at welds on the door
frame.

My next observation is rust-related but I think unrelated
(not around welds). I've noticed small rust spots on the paint
(very tiny) in many spots on the side of the vehicle. I was
wondering if it could be stone chips but they are too many and
too small. Then I noticed similar on the side on the rear
bumper that is plastic. It sure looks like very tiny rust spots
but how could it rust? My only guess is it is a metal flake
in the paint that is rusting. Anyone else notice rust on their
Odyssey? I never noticed until I took a close look (the 3 year
warranty is about to run out so I took a look at what needs fixing).