What was found
AT 37,000 FT BOTH CREWMEMBERS NOTED A BOLD ACRYLIC ODOR IN THE COCKPIT. RAN ENVIRONMENTAL SMOKE/ODOR CHECKLIST. AFTER ABOUT A MINUTE, ODOR SEEMED TO DISSIPATE. NOTIFIED ATC AND WERE GIVEN PRIORITY HANDLING. AFTER COMPLETION OF THE CHECKLIST & BEING VECTOR ONTO THE APPROACH AT 3000 FT, ODOR PRESENT AGAIN. ODOR SEEMED TO COME FROM THE GASPER VENTS BUT IT WAS VERY HARD TO ISOLATE. INSPECTED AND COULD NOT DUPLICATE.