A lifelong quadriplegic, Hollenstein has become a highly respected disabled artist who utilizes the tires of his wheelchair instead of traditional painting methods to create his works.

Hollenstein, the son of a restaurateur father and an ex-Marine Corps mother, was raised in Canoga Park, in the San Fernando Valley region of the Los Angeles Metropolitan Area.

[7] Hollenstein works in an abstract impressionist style which incorporates bright colors and often invokes a sense of motion.

[3] Other celebrity patrons include Ringo Starr, Slash (Guns N' Roses),[7] Elliot Easton (The Cars),[3] Nick Hexum (311), author Dean Koontz,[4] Elton John, and television evangelist Joel Osteen.

Ten percent of all of the sales of Hollenstein's paintings go to Canine Companions for Independence, a non-profit organization that trains service dogs.

[4] In 2008, Hollenstein donated Helping Hands, a painting which featured the handprints of sixteen rock musicians, including those of Ringo Starr and Joe Walsh, to the non-profit Shane's Inspiration.

[14] In 2011, a solo exhibition of Hollenstein's work entitled "Wheels of Hope" donated forty percent of its proceeds to six different charitable organizations.