Airbrush Overspray

If you paint has been thoroughly and sufficiently mixed, the sheen (whether flat or gloss) should be uniform across the entire sprayed area. If you are working with a  flat paint, it should remain flat, regardless of the thickness of the coat applied.  

If there are no apparent runs or patches and you are going to glosscoat/Future anyway, I wouldn't really worry about it because it will be flat-coated after decalling anyway.

What brand and colour of paint are you using?

EDIT: It just occurred to me that if the base styrene colour and the colour you're painting are similar, it might simply be a case of insufficient coverage, allowing the gloss of the underlying surface to show throiugh.

Hello Phil,

Thank you for the quick response.

I'm using MM enamel (dark sea blue) for the top cote.  The base styrene color is gray.

I appreciate the suggestion, I have to spray one more light cote of dark sea blue over my curved masks on the side.  

After this last spray with the AB, I will take my chances with the future.

Thanks again

While I was spraying the last masks, I set the pressure to low & the needle to just above fine, went over the "shiny" areas, that did the trick.

By no means am I ready to enter this model into a competition, but at least lightly spraying over the shine made it look flat again.

As Phil said, if the paint is sufficiently mixed, the gloss should be constant. However, paints reduced for airbrushing may settle or separate in the paint cup, producing variations in gloss. This effect can be worsened if the thinning solvent is marginally compatible with the paint.