74 dually,
Most all Acrylic Uerathanes , and Uerathanes are high solids , they all have their own catylist / hardner, some will also require reducer.
These products are made VOC compliant , therefore High Solids. Plus they were designed to spray with an HVLP gun . Better paint transfer from gun to vehicle. Its why lacquer is being forced out , I think Acrylic enamels and synthetic enamels will be next.

Also make sure you wear a good fitting chacoal respirator 3m makes a good one that is fairly cheap , or a fresh air system when shooting , as the catylist has what is called Isocyanates in it , it will kill you eventually or make you deathly sick !

SprayTech