If you ever want to use an electric razor for a moustache, this is what works for me.

My moustache + facial hair usually are as tough as tooth brush bristles. Poor me. ^^; Heh Heh. To get rid of tough hair like that, I use a Remington model R 835 electric razor. It has 3 circular rotating blade heads.

Just do the instrustion manual's usual maintenane of the razor, and don't press down on your face too much when using the razor, and you are all set.

Rob