Krud Kutter. I dilute it quite a bit, and only use stronger when needed. Then rinse with copious amounts of water.
I remove any meters, or vulnerable things, use masking tape or Al. foil on what can't be removed. A soft chip brush is my main tool, with a sponge, nail brush, and only occasionally a soft scotchbright pad. I work at the sink, and use a small bowl to hold my diluted solution, and a cup for rinsing.
If possible I dry the radios in the oven preheated to 120-130F max. Ususally takes less than an hour for all to be warm and dry.
I was actually talking about panels and knobs only. If you are doing the chassis, then this is the best way to go.