SEM's stuff by eastwood is the best! Jeff (bigblock73) recommended it to me and i used it... dyed my dash, headliner trim with it... mostly satified with the results... the only complaint i had was (as Jeff advised me) is to make sure that you do your last coat w/ a mostly full can... otherwise, the color may vary a little bit. otherwise, if you can front the $9/can, and follow the directions, you'll do well!
check this
link out for some pics of my tan to grey process!