Just a side note, but if the paint is bubbling, it is most likely a problem under the paint. usually involving some kind of filler or glaze that has failed due to trapped water or rust forming. I would atleast sand through the base color and see what you find under it where the bubbles are. After all the chips, bubbles and other imperfections are taken care of, prime all the places you sanded through the clear with epoxy or at the very least a quality 2k urethane like Evercoat, SPI, or something similar. Once the primer dries, wet sand with 600 to finish the repair. When you feel you have the places repaired you can wet sand the entire panel with the damaged places with 600-1000 wet, then clean with wax and grease remover, tack off and start by spraying the base color on the spot only witht he first coat and then let each following coat go a little further out while "feathering" the new base into the panel. This can be done by either pulling the gun further away as you go out from the repair or by turning the gun with your wrist, just becareful not to go to far with either technique or you'll have dry spray. Once you get the base blended you can tack off the panels and apply the clear. If you have several places all over the car it would probably be easier to just 600 the whole ar wet after you get the places primed and just base and clear the whole car or use a single stage if you prefer. This is just how I would do it, but keep in mind that blending is something that takes a bit of practice to get right.
Best of luck to you. Hope something here helps you get your car looking good as new.