This article is from the Model Rockets FAQ, by Wolfram von Kiparski with numerous contributions by others.
Since scale modeling is such a small segment of model rocketry, there's
not much "how-to" info in the model rocket literature. Peter Alway gives
some basic, low-tech tips in his book. For more advanced techniques,
look in magazines for the plastic model enthusiast: "Scale Modeler" and
"Fine Scale Modeler" are two examples. Useful techniques also appear
occasionally in the model airplane model and ship magazines.