 His first bone art show, 2005's "Full Spectrum Dominance", covered plastic machine guns with tiny bones to protest the War on Terror and the militarisation of children's toys.By 2010 he was specialising in textural bone sculptures.In 2014 Mahalski collaborated with the Wellington luthier David Gilberd to build a functioning slide guitar completely covered with animal bones, including 35 skulls, using trimmed cow ribs as frets.