In the year 2001, he started using oil colors in most of his paintings which are currently on exhibition at the Kenya National Museum gallery, Banana Hill Art Gallery and various other galleries around Nairobi.
Some of Wamunti's notable exhbitions include - East african art exhibition New Jersey, USA (2003), Art Affair at RaMoMa (2003) African art exhibition in New York, USA (2003), Art workshop at RaMoMa Nairobi (2004), Art festival at the national museum of Kenya (2004) and an Art workshop at Banana hill art studio (2005).