Interior Paint Question

[Qilene15]

I decided I don't like the silver panel next to the radio anymore, so I wanted to paint it black, nice and simple. The only problem is my car gets incredibly hot and humid here in Orlando, it feels like it's about 150 degrees inside it sometimes haha. And I can't park in the garage (other cars in there), so I was worried that regular spraypaint wouldn't cut, so I was thinking about using EngineEnamel. Would this work out alright?

Also, do you guys think a gloss or flat black would better match a black leather?

Thanks!