>>9325383>You can scratch the paint off a very smooth un-primed surface pretty easily.Actually no, you can't, unless you use metal tools or something. There was quite a bit of masking over that metallic coat too and none of it lifted.
>"Quality of a surface" is also vague and not very helpful to someone new to the hobby.The simple fact is that someone new to the hobby is unlikely to achieve the smoothness of bare plastic after they spray a coat of primer and/or a coat of black gloss. Spraying metallic paint from a can over washed bare plastic will likely result in a better looking metallic coat than spraying over undercoat of questionable quality.
>>9325424Your pic related is misleading. It shows what happens in a controlled experiment (after spraying one coat of color over given primer). Spray another coat or two of paint with good pigment density like MrColor and the differences will disappear.
>This doesn't make sense as a statementYes it does. For metallic to be shiny the surface needs to be smooth and any imperfections will show up immediately. Spraying a second coat of metallic all but removes the color of the surface from the equation but no matter how many coats you spray the imperfections will be there.