Before his MA at the RCA, Feltrin worked mostly in wood, both on his own and in collaboration and on projects with other artists and designers. Since his studies at the RCA, he has worked principally with resins and ceramics. The latter is a particular passion, which he is currently exploring in detail, inventing new methods and tweaking old ones, to create new ways of producing batch-based ceramics.
While continuing his own practice he also works with designer Martino Gamper and teaches design at Staffordshire University. Teaching acts a form of continuous research, which stimulates his own studio development. He works extensively with developing new moulding techniques. His interest in moulds as a design process is piqued by the need to make quick decisions that will have functional applications.