Does anyone have suggestions to reduce roller marks? I'd like my paint to lay down as one coat and not be like more glossy in some areas than in others. I have complete coverage and I'm about to wet sand with 1000 grit before my fifth coat. Currently I mix the paint with mineral spirits 1:1 and roll it on pretty thin, wringing the paint out of the roller until I have to apply a fair bit of pressure to get it onto my car. What am I doing wrong that makes it look uneven from certain angles?