Change after that the brush's parameters. Set the Soft Light option (I use to change the blending mode of the brush, but we may also create a new layer, setting the parameters for it and picturing on this layer with a brush of Normal option). The effect will be close to ours, but a little different anyway. Start painting the soldier's armor. The color may be different from what you've expected, but sometimes it is even more indicated. The metallic surface finally starts to appear.