I used POR15 gray on all my repairs above, then covered with primer for better adhesion for the rustoleum to stick...I must have missed that photo in the POR15 painted stage. I've attached it below.
As you can see the POR gray is quite a bit darker than the stock frame color, but that actually helps make it obvious which areas you've painted.
To clarify, the layers of paint I used were
POR15 Gray (2-3 coats)
POR Self Etching Primer (2 coats)
Rustoleum Smoke Gray (2 coats)