Since you're not going for a ZCCA Stock Class look, here's another BIG vote for 2-stage. Appearance: clear coat will give a big "pop" to the underlying color. Buffed and waxed - grab your cheap sunglasses (apologies to ZZ Top). Protection: the additional layer of clear is a barrier protecting the color coat from wear, swirl marks, light scratches, ...etc. Maintenance: the clear can easily be re-worked if needed, not so the metallic base coat. Earlier this year I noticed some irregularities on my hood when viewed in a reflection - very small hair-width depressions in a close pattern almost like orbital sander marks. Most important, a fellow club member who has done some ZCCA judging spotted them and said that could be a judging problem at ZCON. I showed it to my paint shop and he said it was likely some shrinkage in the primer or base coat that later became visible in the clear coat. Repainting a four-year old hood would be a color-match nightmare. The solution: color-sand the hood and re-clear it. When buffed out, the fresh clear had filled any remaining depressions. Problem solved! Hope this helps your decision process.