The wax plan is pretty solid for a shorter beard then elastic bands if you want it longer (though with that style I probably wouldn't recommend it). Also, don't listen to the people going "don't do that it's silly/stereotypical metal" because lets face it, everything that can be done with hair/beards has pretty much been done by now so there's always some group of people you're going to look like so my suggestion is give it a try and if you like it bollocks to everybody else and if you don't the trimmers are always easy to bring out of the cupboard.