Mr Donaldson said he'd spent much of his life enjoying the outdoors and skin cancers were "a legacy of that lifestyle".
While he remembers his mother putting sunscreen on him, Mr Donaldson said he only wore a hat under sufferance and rarely wore it at school.
"I always had a peeling nose as a kid," he said. "I wasn't really aware of skin cancer or sun damage until later in life."
But that's all changed. Mr Donaldson said he was now rarely seen without a hat on and being aware of changes in his skin was just a part of his daily routine. He also tries to limit his exposure to the sun in the middle hours of the day.
Mr Donaldson said being sun smart was made easier thanks to some fantastic new products on the market like a sunblock which also had cooling abilities for mountain biking as well as a SPF50 cap which he wears under his helmet to stop sun exposure through the vents in the helmet when riding.