You don't want to paint your window now do you? No...that wouldn't be very smart. But never fear, masking tape is here! You'll need painters tape (blue) or extra strong auto masking tape (green) to cover all the areas that are already the right color.
Some things to mask:
- Side windows
- Rear window
- Rubber gaskets that you weren't able to remove in step 2
- Door handles
- The inside of the car (you'll have the doors open when you paint)
- Tail pipe
- Engine bay
- Radiator (believe me, it looks quite retarded if paint gets on there when you paint the front of the car)
- Any important-looking labels inside the door that have important car information
Again, things like tail lights, head lights, rubber gaskets, car logos, etc should really be removed before you paint, or it will end up looking like a noob did it with finger paint.
For big areas use quality masking paper or cardboard, and garbage bags work well for tires.
The quality of the mask job is immeasurably important. If you do super crisp accurate masking, your paint job will look like the car was always that color. Spend as much time on this step as possible.