Buster...
Here's your pictures, the first one is the original you sent me resized to 800 pixels wide.
This second picture I cropped out of the original and is full resolution and 800 pixels wide.
and "yeperdoo" that looks like white paint overspray.
You say you tried to remove it with M105 and a wool pad on a rotary buffer. The problem with this approach is M105 uses SMAT or super microscopic abrasive technology so it has the consistency of Jergans Hand Lotion.
This means it will tend to glide over the dots of paint instead of kick them off, which is what you want.
An old fashioned rocks in a bottle crap compound would probably work but it would also remove a TON of paint and leave DEEP scratches in a horizontal panel that would lead to CLEARCOAT FAILURE in no time.
The way to remove this overspray would be to use a tool like the Medium Grade Nanoskin Autoscrub Towel and rub like a son-of-a-gun or possibly the Medium Grade Nanoskin Autoscrub Pad on a FLEX 3401 and let this gear-driven orbital work horse do the work for you.
I see some rust showing in the original picture which kind of indicates to me this Tahoe has not been 100% fully maintained throughout it's life.
In Renny Doyle's book How to Start a Detailing Business, I'm a guest contributor and I have a section in this book about learning the art of turning work down and let some other guy have the blessing. So if this is for a customer you might want to balance how much work it will cost you compared to how much profit you can make and then either take the job or like I say, let some other guy have the blessing.
Otherwise, you could try an aggressive detailing clay bar and rub like a son-of-a-gun or purchase the Nanoskin Medium Autoscrub Towel and pass the cost onto the customer by building it into the price you charge him to remove the overspray.
Hope the above helps a little...
Me?I'd probably try the Nanoskin Towel because I can PRESS down really hard when rubbing it over the paint and probably remove the majority of it if not all of it.
Another option would be to chemically dissolve it using a product like Xenit.
See what I wrote about it here,
Yellow road paint, HELP![/COLOR]
(He used the word help but he did add important words explaining the problem.
