Some friendships can blossom from the unlikeliest places - like a love for corrugated iron.
Mark and Genius have been toiling together in the bowels of a Woodstock art studio for the last decade, flattening discarded sheets of iron used to build shelters into wall art that fetch high prices.
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"Time is the artist, not me," says Mark as he takes you on a tour of his studio, his vast collection of corrugated iron carefully organised according to colour and size.
For Genius - a Zimbabwean who came to South Africa to sell handmade wire and bead keyrings at the age of 17 - working with Mark has been a lifelong course on the world of art.
The two go to great lengths to find their material - some of which are more than 130 years old - and have no interest in anything new and shiny. The iron needs to have seen a lifetime of wear-and-tear, an ode to the beauty of the metal and time.
On any given day, of 100 sheets they find, they may buy 10, of which two to three are good enough to make it into a piece.
One day Mark wants Genius to completely take over the business, providing support for his protege to stand firmly on his own feet and craft his solo voice.
If you want to learn more about their artwork, check out their website.
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One of their art pieces. (Photo: Gabi Zietsman)
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