Prepare a medium-hot barbecue fire. Oil grill rack or coat with a nonstick
vegetable spray. If using bamboo skewers, soak them at least 30 minutes in cold
water.
Combine spices in a small dish, and in another bowl combine oil and garlic.
Brush shrimp with flavored oil, then sprinkle with the spice mixture to coat
lightly. Let the shrimp stand 20 to 30 minutes at room temperature.
Thread shrimp on metal or soaked bamboo skewers. Grill, turning once or
twice, 3 to 5 minutes, until firm and just cooked through. Serve shrimp with
lemon or lime wedges.