Doesn't make much difference. Either way is OK. You're probably only going to see the upper half, anyway. I suppose you might do upper half only, so that you can elevate the front sight some appropriate amount for a particular long distance like 75 or 100yd or something, but that's a personal choice. So is color. I happen to prefer the color you illustrated, but some folks might like fluorescent green, or even white, especially if it emits light after having been "loaded" with a flashlight.My question is this. If you paint your revolver sights do you paint the entire ramp or just the top part of it? I have a 1981 Model 63 with the factory red insert and it is only the top half. I painted the Model 10 sight (entire ramp). See pictures. Is it personal preference or is one way the best? Any preference on color?