Actually, what this is is a test...
And Feek, contact paper is close.
I figured since I now have hi-res shots of the surface of the original, I could make "texture maps". I copied and pasted clear areas of speckle on the shots of the original, and just repeated until I had a full image of just plain speckle off the original.
I printed this out on Avery brand self-adhesive clear label sheets, and stuck a block of it on the model.
So...
What you're looking at is an applique afterall. The block in the image I posted represents about the largest sized block of speckle found on the Death Star. The self-adhesive clear label sheets adhered to the compound curves fairly well. Though if you look close at the image, you can see some deviation on the edges.
But, a few things...
First; this block is larger than I'd actually be doing on the model. All the sections to be used on the model would be more narrow, or shorter, and thus should conform to the compound curves much better.
Second, this area on the model was neither sanded or cleaned prior to me laying down the test section, so that may be playing a negative role regarding the adhision.
Third, this block was cut with 90-degree angles; no curvature at the top or bottom edges, and no angling in of the side eges.
Finally, there is no flat clear coat sealing it over.