I don't have experience with using Wilt Pruf for that purpose, but I can tell you that WP itself can burn rose foliage under some circumstances. Be sure plants are well hydrated, and apply in the cool of the morning. Don't apply to wilting transplants, but apply days in advance of transplanting.

By reducing transpiration, anti-transpirants cause leaves to "run hotter" than they would otherwise, because transpiration cools the leaf. But this is not to say your idea would never work. I really don't know.