Dear Nancy;
    If you just say "perk", no one will know that you don't know and will
assume that you do.
    Art

Nancy Smith wrote:

> Hello,
>
> Coming out from "observe" mode to post a question:
>
> How best to preserve the appearance of an operculum (by the way, is pleural
> of operculum "opercula" as my medical terminology would suggest?)?  Have
> used a coating of mineral oil but this does not last very long and the
> operculum dries out quickly and appears to even shrink.
>
> Thanks,
> Nancy