i know that the front emblem clips in, you un clip it from the back of the grille i think it would be easyier if you remove the front grille to do it, the rear i dont know i had my friend do it while my car was at his shop
CAREFULLY pry off the emblem with a flat head screwdriver (wrapped in electrical tape to save the paintjob)
sand the emblem completely (all the nooks and crannies too)
paint the desired color. i prefer about 4 coats to insure full coverage
then paint with a high gloss clear coat (to protect your paintjob. the more coats you put on, the more "depth" the piece will appear to have.
to put back on, disassemble the clips into two pieces. put the tabbed pieces into the holes in the trunk. attach the other pieces onto the emblem. line the emblem up and push it on carefully (but firmly).