The coating does not need to be tempered like a cocoa butter-based product but does require cooling to prevent bloom formation.
Without cooling, fat bloom forms immediately as the product sets up. In Figure 1, the top row of petri dishes shows the crystallization of a coating made with partially hydrogenated oil: the petri dish on the left was cooled, and the one on the right was left out at room temperature. Both have a good gloss and show no signs of bloom. The bottom row of petri dishes shows the crystallization of a coating made with fractionated oil: the petri dish on the left was cooled, and the one on the right was left at room temperature and developed bloom and "skin" surface formation.