pyramiding at early stage is a cosmetic problem in general, but in severe conditions it could be a sign of MBD(Metabolic Bone Disorder) so better safe than sorry. I'd suggest not to use any kind of ointment on the shell and let it be natural, Besides they are already beautiful without the shiny shells.Is pyramiding a health problem...?
I di sprey and sometime a couple of drops of coconut or almond oil to shine their shell...