spread it on 2 coats. let it dry then spray laquer over the bumpers let that dry n then rub black to black which is a clear spray. that will make them nice n dark. u will however have to do that each time u clean ur car unfortunatly. pain in the arse but looks much beta.
Yeah yeah, thats what ive used anyway...im gonna just keep applying it and hopefully it'll build up a nice black colour...but if you look at my pics anyway you should see what happens after just one coat