I have posted this in the past but I am so supportive of this product that I will do so
again.

If one is looking for the means to heighten the color of one's shells
without the greasiness of mineral oil, you want to use Dow Corning Silicone
200 Fluid.  This is available in various container sizes and can be obtained
at industrial distributors like Graingers or McMaster-Carr.  You might also
find it at a well stocked paint store.

It is rather expensive and costs something like $90.00 a gallon, but this
quantity should last you for many years.  It works absolute magic and I think it is
worth the cost.  It is pure silicon, non-bioactive and non-greasy.  I know several very reputable dealers
and collectors who swear by it.

Anyway, forgive my persistance but this is stuff is the best.

Regards,

Scott Jordan