I used their service once, my 155 airbrush came back early the following week, no charge.
A caution for you: Since paint did get back into the handle area, you might well, (or even likely,) have paint down into the air valve. That will not be good for the valve, be sure to mention that you want the valve checked for any damage from paint residue, they can replace as necessary.
Badger is a first rate company, they'll take good care of your AB. Good luck with it.