I rolled mine on, but would recommend spraying if it's an option. I'm not the most OCD person, but i had someone helping who is. I still had issues getting and even appearance in the texture. If you do choose to roll it. Change out your rollers often, before the foam starts to wear out. Prep is 90% of the job, like any other painting application.Did you roll or spray? Any tips other than a second set of hands and removing everything? Looking to do my 40