04/20/2007 AT 10:50 AM EDT
Van Halen guitarist Eddie Van Halen is getting out of rehab after a month-long stay.
The rocker, 52, is due at the Phoenix International Speedway on Friday to unveil two limited-edition guitars – his first public appearance since he entered rehab
in early March.
On Saturday, he'll serve as an honorary race official for the Subway Fresh Fit 500 NASCAR Nextel Cup Series race at the Phoenix track, where he will greet drivers before they start their engines.
When he announced last month that he was seeking treatment, he wrote to fans on his band's Web site: "I have always and will always feel a responsibility to give you my best. At the moment I do not feel that I can give you my best. That's why I have decided to enter a rehabilitation facility to work on myself, so that in the future I can deliver the 110 percent that I feel I owe you and want to give you."
On March 12, while he was in rehab, Van Halen was inducted into the Rock and Roll Hall of Fame
in New York City, although only two members – Sammy Hagar and Michael Anthony – attended the ceremony. (David Lee Roth boycotted because he wasn't allowed to sing his hit "Jump.")
Van Halen's ex-wife, Valerie Bertinelli, who filed for divorce in 2005
after a four-year separation, also made news earlier this month when she revealed to PEOPLE that she planned to lose 30 lbs.
as the new celebrity face of Jenny Craig.
Reporting by HOWARD BREUER