With single stage it is very difficult but can be done. Basically, sand adjacent blend panel with 1000 grit wet paper, then at the far end of the panel go over it with 1500, just barley dust the paint on when you get into that area. Do not put a full heavy coat on. Base coat clear is really simple compared to single stage, basically prep as above, but step your base coat out to about 3/4 of the blend panel then clear the whole panel