What is this? (Paint related)

i was worried yesterday when he said he wasnt using reducer.
me too, but all my experience is with acrylic enamel so I don't know the way urethane's work- whether some may come pre-reduced or something...


...you know, like the 'pre-mixed coolant' you can buy, so you can pay extra for the water:D


edit- and I figured the 'ripples' mentioned in the first post were spray strokes, but I wasn't sure...best part is, it's an easy fix and the cut and buff on the final coat will still look great.