To all of you guys who suggested Simple Green -- my sincere thanks. I have a 4 oz. sample bottle that I picked up at the PRI show or SEMA 3 or 4 years ago. Been sitting in a cabinet since. Did a 1-foot sq. section. Holy cow! The trailer is white! Next project Norm Sippel '59 Turner ATC 20' enclosed "LowBoy" (only 7' high)