Hi guys. Let me start by saying I sense I'm totally over my head in this forum of experts, but this seemed the best place to post. The photo is of a Merkur 41C. I bought it used, and it's in really good shape except for this tiny rust spot. (The brownish granular rust-looking stuff around the center post is just the play of light. The only issue is that tiny spot in the rather poorly drawn red circle.) I worked it pretty good with hot water, Dawn Ultra and a toothbrush but no luck. I did read the "Non-abrasvie rust removal recommendations" post here in the forum and the excellent responses. It seems to me DrStrange's aluminum foil and white vinegar suggestion How to Clean Rust - https://www.ellaclaireinspired.com/clean-rust-removal/ might be best to try, especially since I have both. The other "solution" I think might be to do nothing. The aluminum foil might scratch the surrounding area, and it hardly seems like that rust spot is in any hurry to spread.