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SÃO PAULO IS A MEGACITY – a sprawling metropolis with frenetic energy, endless traffic and a huge population. It's also the home of Latin America's largest coatings and finishings fair, Expo Revestir. What to expect of an invitation to attend a tile/surfaces trade fair in South America? Would it be interesting and VISI-worthy? I wasn't sure. I had little idea of how big Brazil's tile industry was. But after one week in the economic heart of the country, I now know it's one of the world's largest