Why wouldn't you just mask the surroundings? sounds faster and easier to get the same outcome....

plus why would you mess around with the brakes on a car if you didn't have to?!

so as i understand it, you are considering doing it without even taking the wheel off?

the paint you will need to do it comes in spray cans so there will be no brushes needed

when i did it i had the calipers off the car completely because i rebuilt the calipers in the process but the paint i used was shit and never seemed to dry properly

if i did it again (apart from using a different pain) i would just leave the calipers on the car and take the wheel off (i thought taking the wheel off was a given no matter what) and just get some cardboard to hold around the back of the caliper behind where ever i spray to catch any overspray

1. remove, brakes and pads.
2. clean, wire brush, turps
3. tape and protect
4. spray with heat resistant paint

I did my front calipers about 3 years ago, still look great.