I put some G. Johnsons' apart with the aim to restore 2 (the other blades were more or less done). Unfortunately the scales were all more or less cracked and/or de-laminated. I decided to probably go with the new ones BUT I will reuse the "flower" colars... which brings me to my question...

I've never cleaned collars like these so any advice would be appreciated. I am almost sure there must be a topic, tutorial or sth like it hidden somewhere but I can't seem to find it. The collars are pretty fragile so the cleaning will probably have to be done by hand?
To you think there's any chance of machine, cleaning them (I was thinking of eg a washer on a rod and a slow spinning buff or sth less catchy)?

the flowery collars to be cleaned:
Name: IMG_7861.jpg Views: 180 Size: 25.3 KB


the 4 Johnsons' bunch
Name: IMG_7825.jpg Views: 165 Size: 33.2 KB