Im using the DP90LV as a base direct to metal etch, then using the PPG Vibrance VP2050 high build which is also a DTM, for extra insurance. Im then going to a "Impact" brand IMP4800 2K Urethane Primer and I so far really like it. Shoots nice, wet sands GREAT! I was using a NASON brand 2 K primer, but they had a issue at a manufacturing plant and I couldnt get any activator for it, so my paint rep told me to shoot this IMPACT brand. A super high end body shop here locally uses the impact sealer and told me it is by far some of the best he has laid down.

I guess there is a lot of options out there, and the way I see it is yes the materials are crazy expensive, but in the long run when my Daughters get my cars they wont have to worry about any paint issues, or rust coming from poor prep.