Look What I've Done - Stupid ME !
#11
Vinegar has been known for a long time to dissolve rust. I've used it to get a rust stain out of vintage fabric and it worked (needs to be dabbed on with cotton bud and left in the sun). Lemon juice is a slightly less acidic (and less effective of course) alternative. The black wouldn't bother me: Looks like copper oxide. Is the bobbin case (nickel or chrome) plated copper? It's definitely an oxidation, but like many others have said you should be able to get rid of the oxide layer.
#12
Senior Member
Thread Starter
Join Date: Nov 2013
Location: SF Bay Area
Posts: 586
Vinegar has been known for a long time to dissolve rust. I've used it to get a rust stain out of vintage fabric and it worked (needs to be dabbed on with cotton bud and left in the sun). Lemon juice is a slightly less acidic (and less effective of course) alternative. The black wouldn't bother me: Looks like copper oxide. Is the bobbin case (nickel or chrome) plated copper? It's definitely an oxidation, but like many others have said you should be able to get rid of the oxide layer.
#13
#14
Super Member
Join Date: Oct 2013
Location: Centralia, WA, USA
Posts: 4,890
The black is a form of iron oxide. The black stuff is stable, unlike red rust. Basically you have a parkerized finish on your bobbin case now. It should polish off with no harm done. Most chemical rust removal methods will convert the rust to the black, stable form of iron oxide.
Rodney
Rodney
#15
Vinegar has been known for a long time to dissolve rust. I've used it to get a rust stain out of vintage fabric and it worked (needs to be dabbed on with cotton bud and left in the sun). Lemon juice is a slightly less acidic (and less effective of course) alternative. The black wouldn't bother me: Looks like copper oxide. Is the bobbin case (nickel or chrome) plated copper? It's definitely an oxidation, but like many others have said you should be able to get rid of the oxide layer.
I once put my wedding rings and two others in jewelry cleaner and forgot them for about 2 weeks. To my horror when I pulled the out they were the same color as your bobbin case. I was devastated!!! I ran them to the jewelers, they told me that the cleaning solution had eaten the rhodium plating off of the gold. I had no idea that gold rings were plated with rhodium to give them the finish that mine had. They had them refinished, I learned an expensive lesson (to this day I have NEVER told my husband what I did!)
#16
#17
#18
Senior Member
Thread Starter
Join Date: Nov 2013
Location: SF Bay Area
Posts: 586
I once put my wedding rings and two others in jewelry cleaner and forgot them for about 2 weeks. To my horror when I pulled the out they were the same color as your bobbin case. I was devastated!!! I ran them to the jewelers, they told me that the cleaning solution had eaten the rhodium plating off of the gold. I had no idea that gold rings were plated with rhodium to give them the finish that mine had. They had them refinished, I learned an expensive lesson (to this day I have NEVER told my husband what I did!)
@rodney - hmmm accidental discovery of how to oxidize your metal and give it a patina look. problem with this is the metal feels so rough. i will see how i can salvage this case with brass. i will never use vinegar again. alcohol, kerosene or metal polish it is for me now. thanks a lot.
Last edited by vmaniqui; 01-27-2014 at 06:05 PM.
Thread
Thread Starter
Forum
Replies
Last Post