I did a search and found some really good tips on how to Age coins. I not looking to age my coins perse. Im trying to make my Kennedy Flipper look like my normal shell set. MY flipper is a bit too shiny compared to the others... If needs to be locked, moved or added to another section please do. PM if you need too...

You could shine your other coins to match the flipper...

May I suggest you to bring ALL your coins to a jeweller and ask him to clean everything alike. With his tools a good jeweller might make you a super job!

Tooth paste and a soft brush. Should take the shine down. worked for me when I bought a johnson liberty shell , that thing was super shinny and didn't match at all, after I used some white tooth paste on it they matched fine.

Same here with my Johnson shells. A little bleach in water (~5% solution), leave for 5 to 15 minutes depending on how dark you want it, then dry and use 1 in 7 fingernail file, sides 4,5, then 7.

They all match well now.

Jim

I found Salt and Vinegar seem to work on me sets in the past. Or you can use an eraser from a pencil.

First question is "Are these silver halves or clad halves?" Some methods like bleach don't work on clad coins.

Bleach and vinegar may not be good choices with the flipper. They will likely hurt or destroy the ru**er b**d.
I'm not sure what to suggest, but I like the idea of bringing the other coin set up to the same luster as the flipper. Then they can all wear together.

Maybe the eraser idea is worth trying first. Don't see that it could hurt. Also, twocan does a lot of work with coins, and his toothpaste idea might be worth a try.

Sammy