On top of the basic paint job which I try to differentiate with the airbrush, I usually use a little bit of dry brushing, a dark wash and maybe also a light dusty wash with oils mixed with Tamiya thinner. And if it is especially shagged (like the He-111 below) some chipping. Lots of fun to do cockpits.
I use the Mig Ammo and AK products as well as home made oil paint concoctions. Graphite pencils and watercolour pencils for scrapes and chipping. I also use the hairspray technique for chipping and dry brushing to highlight details. I dip clear parts such as HUDs in clear to get them looking more like glass. I don't use a gloss coat if I want the washes to stain the base colours, but if I want to add pin washes I use Tamiya X-22 clear thinned with Mr Levelling Thinner.
Yeah I don't tend to gloss coat interiors either, exteriors are different. For the dials I use the Aqua stuff from AK it's the best I've seen. I used it on the goggles of my figure I recently did here.