i can explain some of the steps of painting the box.
first i sanded the hole box with 150 grit. then i put a coat of sealer on the box. after it dried sanded some more with 240 grit till all the holes from the screws and the seems from where the wood meets the wood. after done sanding put a coat of primar on, then sanded again with 240 grit. then another coat of sealent. after that all i did was sprayed on 2 coats of regular black car paint. then the first coat of clear i added the silver sparkles into the clear. after that dried another 3 coats of clear was added with out the silver flakes. then i wet sanded and polished and thats the trick. My dads owns an automotive shop with a spray booth so it was easy to paint the box with there spray guns and such.