Complex sentence: His guitar playing was extremely percussive, he used occassionally the guitar body as a percussion instrument; this style was established permanently when used the slide guitar in about a third of recordings on his delta blues repertoire.
Split into simpler sentences: His guitar playing was extremely percussive, he used occassionally the guitar body as a percussion instument. He used the slide guitar in about a third of his recordings, established this style as permanent feature of his delta blues repertoire.