Quoted from NYP:
When your trying to sand the clear to get rid of edges, there's a fine line (see what I did there) between sanding too much and taking paint off, or sanding too little and not getting rid of the edges. I guess it's just experience? Take that letter 'B' for instance, that's from sanding, I assume. I'm also assuming that you save the paint so you can touch that up. But doesn't touching up that red create as bump with the paint that will show up through the next layer of clear?
Yes you have to have an eye and feel for it .
That mark in the B is actually from peeling the stencils off. Some details are small and you can nick it peeling it off.
I use the same paint to repaint but it doesn’t make bumps or edges because it takes so much less spraying to tighten the questionable spots up than it did to create the art over a blank. So just a mist over something that is 99% there compared to a true three or four coats of color.