If you use alcohol after mineral spirits you can skip the water and the heatgun alltogether. Simply dip a cotton swab in denatured alcohol and run it around the race once, or just dip the chain in a the alcohol and let it hang dry. Sounds easier to me than intentionally introducing water into areas and then having to take an additional step of having to heat the surfaces to the point of evaporating the water. Plus, you don't have to worry about a heat gun damaging non-metallic parts like seals.