I seem to be having problems with the primer I'm using at work its Evercoat Uro-Fill , Acrylic Urethane primer . What seems to be happening is that it 'sinks' a few days after the vehicle is painted and all body work areas and deep sand scratches show up . The last one in particular was a Lamborghini kit car that I painted that we boarded out the special primer they had on the fibreglass (brand unknown) with 120 then we used our primer I mentioned above and blocked it out with 240 and then primed again and final sanded with 400 . After I painted it it was fine , it was a very dark blue/purple and it was nice and straight with no scratches whatsoever but now about a week later the scratches are showing up , not very distinct gouges or nothing but its just starting to look rough and wierd , very hard to explain , almost like it was marblized and not enough clear if anyone knows what marblizing is . It just seems as though the material under the clear is slightly textured . Why did this happen , and why is it that on other jobs that have spots that have had body fill on them seem to start showing up ?