Well, it has been years that I have wanted to build a MAME cabinet and just recently an old Sega cabinet fell into my lap (not literally) for practically free so I decided to bite the bullet and try my hand at modding it.
I have absolutely no woodworking skills, but I am pretty handy with electronics so I am lucky enough to have the king of the custom cabinets, Knievel, (who happens to be from my hometown) build me a custom CP and CP box...probably saving me some major headaches.
The cabinet was retrofitted to NFL Blitz and then gutted before it came into my hands. I am not sure what it was originally, maybe someone here will recognize the cabinet and can let me know.
I plan on the following:
1) stripping the cabinet down to the wood by removing the current CP, coin door, marquee, and monitor bezel and then scrubbing it and painting it solid black.
2) sticking with the ever popular (I don't need to be original) black with blue T-molding color scheme. Basically the Neon Mame style colors.
3) either placing the coin door back or removing the lower front panel and replacing with a door or doors.
4) create shelving inside the dead space to house the computer, sub, and my old Sega CD-ROM system (with light guns).
5) obtain a 27" or 25" TV and mount it somehow inside...There are already 2 metal mounting bars but I think I will have to retrofit with some sort of wood bracket to get it in position...probably out of the original TV casing as well...bye bye warranty.

6) build in a slide out keyboard tray to fit underneath Knievel's CP. I was thinking of making it sturdy enough to mount my Act Labs Force RS steering wheel and shifter on to get in some 270 driving games.
7) possibly bling it up with some LEDs, Neon, or other lighting to make it pop.
Please take a look at the current state of the cabinet and let me know your thoughts. I am up for any recommendations as this will be my first attempt and I want to make it good...so the wife lets me bring it in the house when it is finished.

Here are some pics: