What the mode is in Photoshop is a guess on my part to as my work is done using Paint.NET (latest version). What I've done though to get the same effect is set the layer mode to overlay:
Compared to a profile where the layer mode is set to normal with opacities between 120 and 160 no a 250 scale:
Which looks best bearing in mind I'm not aiming for a photoreal finish like a few people on this site but more of a finish you'd see in books like Military Aircraft Markings & Profiles by Barry Wheeler.
D