Yes, low-med heat is the key imo too. But some actually use high heat. Over on the Handlebar club forum, a popular method for a natural "swoop" seems to be the hair dryer and lanolin approach. Unfortunately, the pics are gone now, but here is a link (external) to a really descriptive post regarding this technique. Here is a link from an external blog about the benefits of using on lanolin on your moustache. And finally, here is a video from the same blogger demonstrating how he uses a hair dryer.


Stop trimming your moustache; greater glory awaits!
...but if you are going to trim, do it right, go pencil...
...then, of course, a nice copstache can be cool too...

Handlebar Club Forum (external site)