Born in Turin, Italy, Michelotti worked for coachbuilders, including Stabilimenti Farina, Vignale, Allemano, Bertone, Ghia, Ghia-Aigle,[2] Scioneri, Monterosa, Viotti, Fissore and OSI, before opening his own design studio in 1959.
He also cooperated with manufacturers producing their own cars based on Fiat or other mechanicals, like Siata, Moretti, Francis Lombardi and Nardi.
In 1968, Michelotti built a concept car based on his DAF 55 design, called Siluro (Italian for torpedo), which remained in his possession until his death.
The Shellette was a beach car with wicker seats and dashboard in the spirit of Ghia's, Fiat 500 and 600 Jollys.
Unlike the Ghia Jolly, the more powerful 47 hp (35 kW) Shellette was a reasonably useful car having a heater and various other creature comforts.
[20] In the 1960s, Michelotti designed a glass-reinforced plastic (GRP) cab for certain lorries made by Scammell, who had become part of Leyland Motors in 1955.