First you need to explain it a little more, what color is your car, is it a custom color(candy,pearl), does it have a clearcoat? Are the scratches and chips and such in one particular area, or all over?

You say down to the fiberglass, well in this case you would have to fill the chips or sand it down till they are gone other wise you will see them, when you paint over it. If the area that is damaged is in one particualr area on the car and you don't have a radical custom color(pearl,candy,etc...) then it may be possible to prep(sand and fill) then spot paint that area to match the car, then buff it out to blend the rest in. this could save moeny, but other times if there is area all over the car it may be just as cheap to do the whole car.

There is a many different avenues you can go with painting. From a quickie paint job all the way to show car quality. Give me a few more detail on what you are looking for and the shape of the car maybe I can help more......