Combine all of the above ingredients (minus the steak and skewers) in a zip lock to create your marinade.
Lay the skirt steak out horizontal to you and flat on your cutting board. Notice the grain of the meat throughout the skirt steak.
Slice the skirt steak into equal 6-10" sections WITH the grain of the meat. Then, turn the newly formed smaller slabs perpendicular to you, and slice each slab into smaller 1" slices AGAINST the grain.
The grain of the meat should be running left to right while you slice from top to bottom.
Once you've sliced your skirt steak into smaller strips put the meat in a large ziplock with the marinade, and let it chill in the refrigerator for up to 2 hours.
While the meat sits in the marinade, soak your bamboo skewers in water too.
When you're ready to make the skewers, turn your grill on and set it up to cook at 180 degrees. While the grill is getting up to temp thread the slices of meat onto the skewers. One slice of meat per skewer.
When the grill gets up to temp place the skewers directly on the grill grate, and let them smoke for about ten minutes.
After ten minutes turn the heat up to 400 degrees. Let the skewers cook for about 5 minutes, and then flip each of them and cook for an additional five minutes.
It's tough to check the temp on these since they are so thin. My best advice is to keep an eye on them, and if you see any of them starting to char, they are definitely done.