Yvonne Rivera, a painter on the Yermo Annex of Marine Corps Logistics Base Barstow, spray paints parts on an M917 dump truck, May 15. Rivera is using techniques she acquired through the Iowa Waste Reduction Center’s Spray Technique and Research for Defense program to accomplish her mission as effectively as possible. - Yvonne Rivera, a painter on the Yermo Annex of Marine Corps Logistics Base Barstow, spray paints parts on an M917 dump truck, May 15. Rivera is using techniques she acquired through the Iowa Waste Reduction Center’s Spray Technique and Research for Defense program to accomplish her mission as effectively as possible.