Welcome to the Bunnings Workshop community. It's a pleasure to have you join us, and thank you for sharing your question about painting your eaves.
Since you've already done the prep work of patching and sanding, I suggest using an exterior paint of your choice. As the name implies this paint is made for outside use and does not require a primer. For example, the Dulux 4L Vivid White Low Sheen Weathershield Exterior Paint is an exterior paint specially designed to provide a tough and hardwearing finish for protection in all Australian weather conditions. It is self-priming and can be applied to a variety of surfaces.