Creating skins from voids

When you select the void file layer, it is an opaque white with black panel lines, rivets & mechanical features as well as some shading.
If you have remove white in your plug-ins folder, you simply double click the selection for remove white in the dropdown and it deletes the white portions of the selected layer. This leaves you with a layer of only rivets & lines. You can then reduce the opacity to make the lines "fade" so they look correct. Black rivets on a light gray background would look a little odd. Dark gray on the other hand looks better.
The reason you need a second layer taken from the void with rivets & panel lines erased is so you can leave it on top at 100% opacity for wheels, cockpit, etc but reduce the darkness of the rivets seperately.
Here is a visual....
You have the void as your 2nd layer (renamed rivets);




You select it and run remove white from your plug-ins;