Dust on my painted model

Fnamels are the main problem here- acrylics seem to dry fast enough that they don't pick up that much dust (unless your workshop is very dusty).  I do find I have to use heat in my workshop, so in winter the airflow from the furnace does stir up more dust than in the summer, so I need to keep my shop cleaner.  Some folks say lower humidity in winter prevents dust settling out as quick.

Since enamels benefit from a drying box, I made sure mine has dust filters on all input and output holes.  That means the models/parts are shielded from dust as well as being heated to speed drying. 

I know some folks put a box over a drying model (with enamels I feel this would add even more to drying time!  Probably fine with acrylics or lacquers, though.

After spraying, put a plastic container box over it to prevent dust from settling on it. It all depends on where you're spraying. Do you work in an area strictly for airbrushing where there tend to be dust flying about? Do you use an airbrush spray booth? Maybe the air flow has diminished from a clogged filter.

More paint will not work. The only remedy to dust in the paint is more elbow grease.  Wet sand with 1000 grit and higher and spray it again.  i have this same problem and hafta do it over and over and over......  especially when trying to get a natural metal or gloss finish.  This is why I have much admiration for the beautiful finishes I see on here. 

As to the drying times, it may seem wierd but I let my nose tell me when it's dry . if you can't smell the paint real close up, it's ready for the next coat.

Get a medium storage container, like a Rubbermaid or Tupperware, and put it over your paint area as soon as you put the airbrush down. Wipe it out with a wet papertowel before spraying first. Once the dust is in, however, all you can do is sand and repaint, as others point out.

Sometimes you can salvage the situation, if the dust isn't stuck too deeply into the paint. Touch the dust speck very lightly with a piece of masking tape. If the dust hasn't adhered too strongly, it might just pick the speck off. Good luck!

To remove the dust you may be able to just brush it off with a soft cloth. If that doesn't go it you will definitely need to sand with a fine grit sandpaper and spray again.

I have several sizes of "Sterlite" plastic containers that I use to cover the model. I turn these upside down over the model and place a small object under the container to give a small degree of air circultion. This "might" allow some dust in but I've never had a problem with it. Its important to kep the container sealed when not in use to prevent accumilation of dust inside it.