AIO does offer decent protetction on its own and is technically not just a paint cleaner. If you are seeking the maximum durability from this layer, I would wait a minimum of 8 hours depending on the humidity and temperature to make sure the acrylics have fully cured. Then top it with the OCW.:up
I like OCW very much for its ease of use, warm carnauba look, and demonstrated longevity for a spray wax/sealant.