There's a significant difference between most marinades and sauces. And that difference is usually sugar. A marinade infuses the meat, while a sauce goes on at the end so that it doesn't burn up in the cooking process. In general, you can start brushing your barbecue sauce on the meat about 20 to 30 minutes before it's ready to come off the grill, especially if you're using indirect heat. If you've got a big old fire raging, you might want to wait until the last 10 minutes. With a sauce that's as tasty as this, you're likely going to want to slather it all over everything you're cooking. But restraint is key—brush on just enough to get the flavor and pass more at the table. No burning, just lip-smacking taste.