car was bare metal bogged up where needed and rust conversion where needed [i did go overboard with the rust conversion goop] =prep wash ,etch primmer,primmer surfacer,sparay putty ,guide coat sanded well weeks later noticed cracks in hatch channels and around door jams .so we sanded thinking it was rust conversion so we took all channels and door jams back to bare metal noticed in channels under cracked sections was bogg ,then we sanded out rust conversion stuff, then i prep washed etched primmer spray puttied and guide coat left for weeks ,cracked again ? !wtf! sanded all out again bare meatal preped and etched and left for weeks and cracked again even where the tail lights sit in there [terrible place to sand ] flat panels all good but its in the corners 90 degree angles thought spray putty shrinking pulling it all of =wasnt used last time it still did it
cold weather coming i cant get passed spray putty we saying = its the etch ,its the spray putty,its the bogg ? please help which one is it