Just be careful drawing a potentially explosive paint fume mixture through a vac system adjacent to an electric motor. The filter will probably take care of most of it (especially if it's a little dirty)... but then again be better safe than sorry.
Some of my friends in the Chicago area Corvair Club make a contest of having vacuum cleaners explode. The idea is to have junk vacuums suck in gasoline and see how long they last and how high they rocket. All done in fun from a safe distance in combination with lots of beer. You have to see in person or view the video tape to believe it. Read about it here:
This link is broken, either the page no longer exists or there is some other issue like a typo.
. The video tape was once sold as a fun raiser. It would make a great YouTube post.