Ill have to take some pics of my interior, and show the world of AFM what i did to it, cause im pretty proud of it. lol..
I took a stock 88LX interior that was all beige on black, with grey seats...
and turned it all black with some blue trim (speaker panels in dash, temp control knobs, etc) and i think it looks 384730384 times better.
All i did was LIGHTLY sand everything down, it really helps if you remove everything from the inside first, lol, but that is kinda obvious, but you never know.
But ya.. lightly sand everything down, then make sure its clean. I just used dishsoap, and it worked fine. Not sure if you're supposed to or not...
Let it dry, and then i just used plastic and vinyl paint which was applied via an aresol can. Worked wonders...
As for the carpet, it was beige too... its now black thanks to some dye i picked up, ALSO in a can. lol...
It took about 4 days to do, working about 4 hours a day.. but thats only cause i had no previous experience with stangs. It was great fun though..
But definately read up all you can, but i know it can be done, cause i did it.
Good luck!