As a songwriter, Rae is best known for the 1982 song, "Inside Out", a hit single by the band Odyssey. Rae's own version was included on his debut album, The Thistle. Rae dedicated the album to "Luzuli and Senkrah and Scotland."
During an October 2012 solo performance at the Paisley Abbey venue in Paisley, Scotland, Roddy Frame, formerly of Aztec Camera, performed a rendition of "Inside Out". Frame explained that during his time as a WEA artist, he was asked about Rae, who was conveyed as a Scottish musician who always wore a kilt and helmet. Frame expressed "love" for the song and explained that he enjoyed playing the song at his home.
In 2007 Rae stood for the Scottish Parliament as an independent in the Scottish Borders electoral constituency of Roxburgh and Berwickshire. He gained 318 votes for a 1.2% share of the vote. He stood again in 2011 as an independent candidate in the expanded seat of Ettrick, Roxburgh and Berwickshire this time polling 308 votes for a 1.1% share.