Underside is looking really good. I noticed too the track looking a little narrow when I built mine. I left it though being such a basic kit, you could drop a tin of paint on this kit and call it done! haha,
That's either moisture in the air or the paint hasn't mixed properly being too cold. It's unbelievably frustrating when that happens but give it a day or two and come back to it with a cool head. Stripping the body gives it a kind of prep for the paint and usually ends up looking amazing on the second attempt!
She cleaned up nicely, great little rescue. Been thinking of doing a rescue model for a while, they pop up here from time to time, but haven't taken the dive of confidence yet, I've seen what work they need sometimes!