I've done a lot of solid color single stage urethane with clear over the top. I usually let the single stage cure for 3-4 days, shrink, do what it is going to do and then 600 it and clear it. I've been happy with the result other than labor intense. It does, to me, give better depth than base/clear. But a friend says he's been doing the same for 4-5 years and NOT sanding. He shoots the single stage, lets it cure over night and hits it unsanded the next morning with clear. Anyone else doing it this way??