One thing You can do to keep from more chipping is only turn the nut side of the bolts that have a washer under them that way the sharp edges of the bolt head or screw head is not pulling on the paint surface also if you can get some small machine washers and use them under the bolt head or screw head you'll barely see them and it will help not chip more paint,Im not saying theres not a problem with you're paint but it will help from more damage to it.
Pete
