To be anointed with oil is to be chosen. Publicly identified as separate, different. The honor of oil running down the head and beard beyond what any clean-freak can imagine. It may be messy, slippery, and need a good rubbing in to carry on, but the honor of the anointing outweighs all that.
The anointing in this passage is the brotherhood dwelling in unity. Messy, slippery, and needing a good massage, the honor of dwelling in unity outweighs all that might be perceived as a gooey, icky mess.
For in unity, the Spirit thrives, the Savior moves, and the God of heaven sees the bride readying herself for the ultimate wedding feast.