Sometimes when selecting a colour to spray in our full dip range you need to decide if you need a base coat/ primer coat.
Example : strong colours like Black , Gun metal grey, Camo Green when sprayed over a dark colours or surface will usually cover fine without shading or a patchy look.
when using colours like yellow which are less opaque when covering over dark colours or surface means you may end up applying a ridiculous amount of coats to hide the original colour or dark surface. So maybe when using less opaque colours then consider using full dip Nardo Grey or white as a base coat before you put on your finished full dip colour.