There is a how to:
http://www.mp3car.com/vbulletin/fabr...ory-bezel.html
Building up the bezel, posts 103, 104, 107, 108, 110, 112, 113, 114, 115,
Getting a smooth surface, posts 118, 119, 120, 121, 127,
Getting straight edges, posts 122, 126,
The whole thread has a ton of great info. For pin holes, use bondo glazing putty or flixible high-build primer. For the straight edge, don't cut right on the line you want, leave some room to sand it down to a perfect edge.
Here's another bezel, that I did, to show that it can be done:
The curved area on the top of the screen bezel was one of the harder things to do with my bezel. Let us know how your refinement process goes.