Paint seams when masking

[scalepaintn]

hello. if your using spray paint out of a shake it up. you will probably never get it out.or smooth. and to much paint and clear you start to lose detail. auto. paints or even [spray paint] transferred in to a paint gun or airbrush will allow you to use a lot less paint. so less build up. and less of a high or low spot. then clear sand and repeat until satisfied. the short answer. lol