Personally, I do almost all of my interiors with flat enamels.
This would be an easy one.
Testors #1250 flat red & #1249 flat black.
I would paint the red first & then mask & paint the black.
After both colors are applied, I would mask off the black inserts in the seats & doors & shoot a coat of Testors clear gloss lacquer on the red.
Once that dries it will give a nice "matte" sheen to the red vinyl & will leave tha black flat.
Then 2 or 3 more coats of gloss will give your dash, steering wheel, & if you want, the tops of the doors, a nice gloss.
Then you can either paint or foil the buttons & the piping around the inserts as well as the door hardware & trim.
The '57 Chevy had a striking interior treatment & luckily a pretty easy one to do in 1/25th scale.
I built one a couple of years ago in "Dusk Pearl" with the silver & dark gray interior.