You don't normally go to this extreme painting baseboards but this custom built house on Eagle Mountain Homes in Abbotsford, BC, had so much trim in it that I completely masked the hardwood flooring off to spray the baseeboards and all the other trim at the same time.
Preparing for spaying like this was a ton of work but it produced silk smooth results and reduced at least 80 hours labour in comparison to traditional brush and roll.
Below is a picture of me taping off the boaseboards.