Ha! Very nice patina indeed. In fact a collector's piece. I would pull that trailer with pride.
Reminds me of an experience decades ago when I wandered into an Oriental art & furnishings store that was going out of business. I was admiring a solid bronze vase from China that was at least 200 years old, Qing Dynasty, though I was clueless at the time. When the owner walked over I said to her, quite naively, "I bet this will shine up really nice if I buff it hard with some rubbing compound!" When she realized I was serious, her expression turned to genuine shock and she whispered urgently, "Oh Sir! That would destroy the antiquity!"
She was right, of course, and I've never forgotten that small lesson in antiquities collecting. I did buy the vase. And still cherish the patina.
Gotta say, sure pulls nice though! Glad I picked this trailer up off a buddy last year, it’s really useful. 
