Anyone know 280 SL characteristics so well you can help out Scott?

I thought you might have an answer to this question...I am looking for a 280sl and was told that there are little triangles in the paint, on the body, above the headlamps that indicate wether or not the car has been repainted. Apparently if the car has been repainted, these marks will be sanded off in the process, thus indicating that it may not be the original color and/or paint. This sounded a little far fetched to me but... I thought I would check with someone knowledgeable to make sure this guy wasn't just blowing smoke.
Thanks,
Scott Wetherby