Greetings,
I have found a technique that has been working well for me. I do 1/48 and wouldn't think of anything smaller but see no reason why it wouldn't work on a smaller scale.
First of all I found the real key is to go and get some good fine detail paint brushes. They aren't too expensive from Hobby Lobby or Michaels. If you are over 40, some type of magnifier.
I first paint my cockpit base color in the appropriate enamel color and let it dry. I next take the appropriate detail paint (acrylic) and paint the detail using real thin paint. Keep your brush wet and be careful of the amount of paint your brush is loaded with. You don't want too much so that it will flow all over the place when you apply the paint. When you apply your paint to the detail piece, it is better to just dab the paint and let if flow off the brush on to the detail part. Use thin coats keeping in mind that it might take several applications to get the color right. The best part of this technique is that if you are not too careful with your edges, you can use a clean detail brush and water to clean up the mistakes and make sharp edges.
I have been experimenting with Vallejo paints. I find that they go on really nice and are pretty good for detail work. The only drawback is that on an unpainted or unprimed surface they are very fragile and will rub away with any handling. This technique has been working well for me and hs resulted in some work I never thought I was capable of doing. The fine brushes and Vallejo paint made the biggest difference in my results
Hope this helps you.
Chuck B.