Oiling the Grates
For flawless grill marks, start with a clean, oiled grill. Scrape the grates with a metal bristle brush to remove any charred bits. After grill is heated, carefully wipe grates with a lightly oiled cloth (hold it with long tongs) to remove any remaining char and to coat the grill.
Types of Skewers
Short or Long
Shorter skewers are perfect for picking up appetizers or for passed hors d'oeuvres. Use the long ones when you plan to serve the food off the skewer.
These skewers are designed for foods that are likely to spin when being turned on the grill, such as shrimp, scallops, peppers, and mushrooms. You can achieve the same result by threading the food through two skewers at once.
Wooden skewers need to be soaked in water for at least 15 minutes to prevent them from catching fire on the grill.