[5] A planned US tour was meant to continue through the remainder of 2002 but was called off by the promoter after two cancelled shows led to rioting by fans.

[6] Around this time Finck and then-bandmate Buckethead contributed to the soundtrack of the John Carpenter movie Ghosts of Mars, playing alongside members of thrash metal group Anthrax and guitar virtuoso Steve Vai.

[7] After his touring obligations with GNR were fulfilled he joined the LedZAerial production (a performance by acrobats set to the music of the band Led Zeppelin).

[8] Finck was invited to rejoin NIN to tour in support of their 2005 album With Teeth but chose not to and the position was filled by Aaron North.

He subsequently contributed to the Nine Inch Nails album The Slip, earning a performance credit alongside then-band members Josh Freese and Alessandro Cortini.

On May 17, 2013, it was announced by Trent Reznor via his Twitter account and the nin.com home page, that Finck would be rejoining Nine Inch Nails for the 2013–14 tours.

[15] In 2003, Finck was credited as one of the writers of a production called "My Birthday Party", which incorporated acrobatics, storytelling, music, acting, and clowning.

The show included actor Viggo Mortensen and was performed at the Miles Memorial Playhouse in Santa Monica, California.

[16] On February 23, 2009 session drummer Josh Freese, who has been a bandmate of Finck's in both Guns N' Roses and Nine Inch Nails, announced that as part of the pricing strategy for his new solo album Since 1972 a one-off package costing $75,000 would include "a flying trapeze lesson with Josh and Robin from NIN" followed by a visit to Robin's place afterwards where "his wife will make you raw lasagna".

Between tours and appearances he frequently makes radical alterations to his image, and is particularly famous among fans for his many distinctive and often unusual hair styles.

[22] He also ordered a custom "Tempest Classic" guitar with gold top finish, an in-built compressor and a wah effect in place of the two tone controls.

He uses a broad range of guitar amps (various models by Marshall Amplification and Mesa Boogie)[26] and effects (including the BOSS DD-5 Digital Delay, Dunlop wah-wah, Devi Ever bit, the legend of fuzz, and RockTron Vodoo Valve)[27] and is known to work very hard to re-create studio tones and textures when playing on stage.

While his primary role in Guns N' Roses was that of lead guitarist, Finck is credited with playing some of the electronic keyboard parts on Chinese Democracy.