Place the sugar, Vitamin C, and paprika into a 1-gallon zip-top bag, seal, and shake to combine. Add the peaches and toss to coat well. Lay the bag flat on a counter and using a straw, suck out any remaining air in the bag. Return to the freezer for up to 6 months. Use in pies, cobblers, smoothies, or any other place you would use fresh peaches.