Hello to all body experts. ...I bought a very old custom fat fender (work done in 1952 ) car 11 years ago that had a 2 year old paint job at the time, car body look good...My problem now is over the past years I drive about 400 miles a year, the paint has cracked on the areas where the rear fender seams were filled in and where the hood was pancaked and over lap ( stick welded and pop riveted was used )... The body has some cracks in lead areas, and cracks where I guess bondo was used ( very thin in that area ). The thick area of the car is not cracking... Now can I use seal sealer to help support the stress on the rear fenders underneath and hood or used something else? I can get to the hood easy and under the rear fender seams is hard to get to...I like to stop all the cracking and repair it before I get the car painted. I like to thank you all that have help people on this subject and others types too.!!!