This David Palmer is not, as claimed by the All Music Guide (whose material is used by iTunes), the David Palmer who was a member of Jethro Tull. This David Palmer plays in an easy rock style favoured by European groups like the Shadows (U.K.) and the Spotnicks (Sweden) as well as German guitarist Ricky King.
The CD came out of Switzerland in 1986 on the Bridge label, produced by Peter Wiberg, who played keyboards and produced several albums for the Spotnicks. And on a posting on a Swedish blog in 2010 former Spotnick guitarist Juri Wiick revealed that he was the lead guitarist on these sessions.
The Spotnicks had a big European hit in the 1960s with Amapola. Their gimmick, at least in those early days, was to dress up in space suits on stage.
In any case here's Juri Wiik (alias David Palmer) playing Verde, popularized by Ricky King and since played by just about every European guitar group.
Magic Guitar Sound hasn't been available on CD for some time and isn't available as a download. There is a Magic Guitar Sound album credited to David Palmer on iTunes, but the track listing is different. The only track common to both versions is Jeux Interdits (Forbidden Games), so whether the download is from the same Swedish sessions is open to question. Certainly, no other guitar CD was issued under the David Palmer name.
From YouTube here's another sample from the CD.
And for comparison with the David Palmer version here's Ricky King's hit recording of Verde.