Preheat the oven to 375 degrees F. Rinse and drain the chickpeas
Carefully roll the chickpeas in a tea towel and remove as many of the skins as you can. (Don't skip this! Beans with the skins on do not get crunchy.)
In a medium bowl, combine the oil, maple syrup, brown sugar, cinnamon, and salt.
Pour the skinned chickpeas into the maple syrup mixture. Toss gently until chickpeas are well coated, being careful to keep the chickpeas whole.
Place the chickpeas on a large rimmed baking sheet.
Place in the oven and bake for 45 minutes, stirring at the 15-minute mark, at 30 minutes, at 38 minutes, and keep a very close eye (and nose!) on them for the last 7 minutes to prevent the sugar from burning.
The garbanzos will crisp up as they cool down - wait until they are fully cool to eat them.