I use high-build rattlecan primers from SEM (a "professional" product from the body shop...huge can, dries through pretty quick, and REALLY builds), Duplicolor (takes longer to flash and dry through, with medium build) and Plasticoat (seems to me to dry through faster than the Duplicolor, builds well, sometimes hard to find).
You really only want to use any of these on heavy custom bodywork, where you want to create a block-sandable surface and fill coarse sanding scratches.
They will obliterate fine details like chrome and scripts quickly.