Your garage door will be cleaned and dried and if needed sanding it will be sanded unless door is very faded then just a wash and then a fresh coat of paint equivalent to your original paint color.

Your garage door will be washed and dried then sanded to a smooth and well paint sticking surface, then painted with two coats minimum of paint.

Your garage door will be washed dried and sanded if needed and given a fresh coat of paint, with the addition of your front door to match the garage door and same steps washed, dried, and fresh coat of paint, in addition if needed or wanted your columns or any trims or areas to match doors can be given the same treatment as garage door and front door 

Your garage doors will be washed and dried and sanded to specifications if needed unless paint is dry and faded badly just washed and give fresh coats of paint equivalent to original color, unless needed or wanted a new color then cost is extra due to sanding