Just did this whole process to 8 of my winches. Had a local plating shop strip the chrome $250 for all of them. Chrome plated bronze is very coarse and pitted once stripped, mine had a pink cast as well, I started with 220 grit then 320 then 500. At that point I decided to buff, things came out great but I wasn't too happy on how it was patinaing naturally so I sanded again at 500 grit a bought some M38 darkening patina online, with dark wax $100. Came out exactly how I wanted. Have yet to update the blog with the process but should have it up in the next couple days. ill try to post a couple photos from my phone
in the mean time.