How do you sand down an inverse etch without destroying the paint in recesses? I always get this ultra-modern shabby look.... I try to convince myself that I really like it but I'd rather choose.
I haven't etched an enclosure yet, but I've read this entire thread, and I've been doing woodworking, autobody, and various hobby crafts for several decades..
I think that key is using a hard sanding block or ultra-flat sanding surface, such as gluing a sheet of sandpaper down to a pane of glass and rubbing the face of the enclosure back and forth on that super-flat sandpaper surface.
Also, preparation is everything. Start by sanding the surface crazy-flat, even before you begin the transfer. Then for outer border, be sure to touch it up with fingernail polish or whatever you use, so that you've got a nice indexing plane to work from.
Finally, I think getting a deep enough etch is important, because I've seen some photos where people got some ghosting and complained of not burning the image long enough.
Again, I'm not an experienced etcher, but I'm studying up a lot on the subject before I take the big plunge.