Difference in paint single and 2 stage
My car was painted with Dupont Chroma base/clear. Since it was painted in 2000 I have had to do some rust repair and I still had a quart of Dupont Chroma One single stage. I figured that I would use that and celar over it to feather in the paint. After spraying the single stage I saw no need to put clear over it. You can not tell where the base/clear is from the single stage.
If you look at the top of the wheel well down behind the rear wheel well and below the feature line on the front fender behind the wheel well those areas are single stage the rest is base/clear.
You likely couldn't get away with doing this with a metallic paint but certainly with a bright solid color it was no issue.