Original: Leonardo would have been exposed to a vast range of technical skills and had the opportunity to learn drafting , chemistry , metallurgy , metal working , plaster casting , leather working , mechanics and carpentry as well as the artistic skills of drawing , painting , sculpting and modelling .
Simplified: While he was at the workshop , he was able to learn all sorts of other useful skills : chemistry , metallurgy , metal working , plaster casting , leather working , mechanics and carpentry .