Overspray on your car isn't uncommon,
but it needs to be removed ASAP.
When you car was brand new (or the last time it left your detailer's shop) your paint felt smooth.
Go wash a small section and feel it now. Does it still feel smooth? Or does it have a rough texture to it?
Overspray happens when someone is spray-painting and the paint drifts through the air and onto your car. Not the end of the world certainly, but it is damaging to your paint so you'll want to get it removed ASAP.
How does it damage your paint?
Well overspray that lands on your paint and can't be easily washed off has already dried and adhered to your paint, which means it will continue to burrow its way into your paint. Not good!
Overspray also causes your car to get dirty much faster, why?
Because now that your paint surface is rough (not smooth), dirt will stick to it much faster and easier, and it will make your job of washing it much harder for the same reason, the dirt can "hang on" to a rough surface easier than a clean, slick surface.
So what to do now?
Panic! Kidding of course. But you don't want to procrastinate either because not only is that overspray munching away on your paint, causing damage, it will also cost you more to remove it the longer you wait.
Find a certified, career detailer and take your car in for an inspection.
Your detailer will be able to test a few spots using a few different methods for removal to determine the safest way to get you back in shape.
There is no "one method" for all overspray removal because it depends on several factors like the age and condition of your car (do you keep up on regular waxing? Did you have a ceramic coating installed prior?)
Ceramic coatings are your best defense...
...against overspray because the little specks of paint flying through the air have a harder time adhering in the first place, and an even harder time burrowing into your ceramic coating.
A car that has been ceramic coated is far easier and cheaper to remove the overspray from.
The key to all this is finding a reputable detailer.
The first step should always be finding an IDA Certified Detailer with the highest ranking called "Skills Validated".
These guy and gals are career detailers who've been tested and scrutinized to ensure they know all the latest methods for safe overspray removal.
Next, check their Google reviews. You can't fake an outstanding online reputation.
Then take your car to them for an in-person inspection. Don't waste your time taking photos to send to your detailer for a quote, or insisting on a quote over the phone because it doesn't work like that. They need to see your car in person, period. There are too many variables to get an accurate quote without an in-person inspection.
-Jason Barker
