The first one doesn't look too bad. It's the wheels that really stand out. Possibly a light overspray of thinned paint will fix them. Personally I think the color is a tad too dark, but that's n what you're asking.
The second one looks as if I need to be stripped. Even if you reshoot it you'll still see the old color borders underneath. I was one of the many who used to advocate using brake fluid to remove paint, but I've since found an even better alternative I use to clean parts when welding - brake cleaner. It dissolves almost any kind of paint instantly.