I like to use a completion checklist while finishing my auto rebuilding. After all the bodywork, powertrain and drivability issues are worked out and the car is back on the road, I use the list to finish up the car. It's basically for the detail and operational items.
Print out the checklist and go through each area on the list. Check for appearance and operation. If you find any problems, fix them. After each area is complete, check it off the list and go on to the next. If you think of anything I've missed, please email.
Click Here For The Checklist