~sigh~. No, Rin Tin Tin did NOT discover tin. Rin Tin Tin was a dog.
The first Rin-Tin-Tin was a German shepherd brought back to the United States from France after World War I by a serviceman named Lee Duncan. Duncan trained him as a police and war dog, then...
Tahn tahng
It's cheaper to make cans with a main steel body and coat them with tin. Strength of steel and the corrosion resistance of tin.
Tin Tin's dog is called Snowy.