How do you highlight your instrument panels?

Try getting some prismatic colored pencils. I've got a few different colors that I use for my aircraft, but they'll work great for autos too!

I just dry brush. For the chrome highlights I have found that Metalizers works real nice dry brushing wise.

You know what you ought to try? Glow in the dark paint. Usually sort of grainy with a greenish tinge but makes an adequate backround colour. Usually have to "charge up" most brands by holding it up to a light for a minute or two, but your instrument bezels look like they're lit, at least in a darkened room.

Not that anybody will ever see them but you....

I second the primsacolor pencils.  Or other wax based pencils.  The verithins by prismatic work great.  I have also used them for panel lines.  I have used silver for the small script badges on bodywork as well.  Works great.