Inexpensive, all-weather car covers can protect your car's paint job better than most other actions when used consistently. Choose a car cover that's the perfect fit for your vehicle. It should fit snugly and have an elasticized bottom that keeps it securely in place. Choose a soft material to avoid scratches, and it should offer UV protection.
Once you choose a car cover, put it on your car every time you park it. That can protect your car from bird excrement, tree sap, and airborne moisture. Also, use reflectors on the car cover if you have to park on the street.
Many people mistakenly think they don't need to use a car cover in a parking garage. However, using the car cover even when it is under the protection of a parking garage will protect it from dust, dirt, and grime. Also, having a cover over your car can deter thieves who aren't able to easily see the contents of your car or its make and model.