I would also have a discussion with the chosen installer, In a manner of speaking; Who cares what the factory did ( "I know I do". I am going to the extent to restore under the carpet to reflect overspray so I get it), What will be acceptable to the installer, do you want the painter to assume what will be acceptable to the top installer. It is always good to communicate with the sub contracted top installer.
just encouraging communication with you & your providers
Jim