Mix up some baking soda in water so there is soda in the bottom of the container. Once the parts come out of the acid, dip them in the backing soda water to neutralize the acid. If you then dunk them in evaporust for a short time, the parts won't flash rust and your evaporust will last a long time.

When the acid gets really dirty and you want to dispose of it, just add backing soda to it until it stops fizzing. Then you can just dump it.