It is not advised to use tough exterior paint inside a garage for walls, ceilings, or furniture. Not only does it take a long time to dry but the continuing fumes can be harmful to your health. Instead, opt for tough latex paint designed for high-traffic areas.
You may be able to paint other items such as yard furniture or posts with expert paint under the cover of your garage so long as you leave the garage door open for good ventilation as you do and move the item outside to dry fully afterward.