paint booth

hey everyone, i was wondering what everyone thinks from experience building a paint booth in a garage, set up the best way possible would be as far as concerns to quality...explosion hazards,police and illegal activities and so on.
I know theres risks to explosion with the fumes and any spark... i know its hard to keep dust down perfect and so on and its not exactly legal in all areas but how were your experiences in making your own paint booths?

Best case senario... good masking and airtight plastic room indoors garage with good warm tempature... good ventalation ,resperator and fans/filters/into wet blankets or something... and all ignition sources off minus florecent lighting. how would that go?