When storing mine for an extended length of time, I wipe them down with Ditzler's Wax and Grease Remover. After adequate drying time, I use either Butcher's Bowling alley wax, a turp based product that I have been using on furniture, hardwood floors, wood work, etc for years. After a dy period of about 3-5 minutes depending on humidity, I buff out with either a 100% cotton diaper or one of these new-fangled microfibre cloths.
I use products that I already have instead of spending money on speciality products. I also use 100% cotton, because certain synthetic fabrics can leave tiny scratches..... eventually "hazing" the surface.