[Obsessive]

I am the original owner of CSX4060, a 16 year old, fiberglass bodied car. When I did the original body work and painted the car, the body was perfectly straight and looked fantastic. However, through the years, the body has taken on a washboard like look in several areas. I first noticed it in the saddle areas between the upper fenders and the hood - see the attached picture. After a while, I noticed similar wiggling below the doors, at the gas cap recess area and even on the top of my doors.

If I block sand the car down to a straight body again and repaint it today, will the body stay straight or does fiberglass just continue to wiggle through the years? Is there a way to keep a fiberglass body looking straight?

Thanks guys.

Mike