Bleeding master cylinder in the car

regarding getting brake fluid on your paint - I went to DOT 5 (silicone) in all my Darts and never looked back. It's expensive to buy but not as expensive as taking a bunch of stuff out to do a good job of repairing the mess when things go wrong. No need to get every little bit of DOT 3 out as the 2 fluids are compatible.
Did you hear about moisture issues when using DOT 5? It's inability to absorb moisture causing corrosion and brake fade due to water puddling?
I use any DOT fluid except 5 for that reason.