FORT LAUDERDALE, Fla. — Carl Edwards’ No. 99 Office Depot Ford Fusion will carry a wedding proposal at today’s NASCAR Sprint Cup Series All-Star Race at Lowe’s Motor Speedway in Charlotte.

The message, appearing on the back of Edwards’ car, is the grand prize in a contest sponsored by Delray Beach office products retailer Office Depot and romance novel publisher Harlequin Enterprises. The winning proposal also comes with a diamond ring and a trip to Sedona, Ariz.

“It’s something that no one else is doing,” said Doreen Ingenito, Office Depot director of sponsorship and retail marketing.

It’s also just the latest example of creativity NASCAR sponsors are using to break through stock car racing’s corporate clutter to reach fans. NASCAR has always been fan-friendly, providing practically unfettered access to drivers and garages at races, but now companies are giving fans new opportunities. Best Western and Hellmann’s put fans’ faces on cars, Crown Royal names its race for a fan, and GlaxoSmithKline used becoming honorary race starter as an incentive to quit smoking.

The marriage proposal contest is new this year, but Office Depot is holding its fourth “Official Small Business of NASCAR” sweepstakes. Companies with 99 or fewer employees can enter through June 22 to win their logo on the back of Edwards’ car for a race and in a less prominent spot for several more races. The prize, which will be awarded at the Sprint Cup race in Kansas Sept. 28, includes a $10,000 business makeover and a year’s use of the NASCAR designation on stationery and business cards.