Where cheating on primer really shows up, is if someday you decided to hang wallpaper. The drying of the wallpaper paste will literally pull the paint off the drywall. I have run across this "self priming" paint when hanging wallpaper. I would put a pre-paper sealer on the walls first, and then hang the paper. All done quite "kosher" and according to accepted practices. A couple days later the customer would call and complain that the seams were lifting. Sure enough, the seams are coming up and the paint is stuck to the back of the wallpaper,. leaving bare drywall paper showing on the wall! Obviously, the paint was not bonded to the wall! I know of no way to correct this problem, other to remove the wallpaper and advise the customer not to hang more wallpaper. So long as only paint is used, the bonding situation does not seem to be aggravated.

For those of you with SW Extra White on your house - just confirming Extra White is a bright white, correct? I have seen a sample and it seems to have a bit of a blue/grey undertone. On a house exterior does it just read white? or white with slight grey/blue? Look forward to hearing back on this. Thank you!

Celery- That color was actually on my list and then for some reason I didn't get a sample of it. I didn't know gray was going out already! I do have Patricia- I live in a teeny little neighborhood with only about 6 houses and two of them have a greenish tint that I am not fond of. The thing is I have a weird tan/brown stone to my house so going sage would probably match better than the blue/gray anyway. We had some storm damage and my roof is now moire black from certainteed. It's definitely a strange looking home but the inside is what sold me on it. Honestly I feel like there's not much hope for curb appeal. I was going to go vertical board and batten style for the hardie board but clearly I am clueless if anyone has better advice I would very much appreciate it!

Money is not a major issue here, and I want to make sure the color matches, but also I don't need to make an extra trip to SW if there's nothing wrong with an off-brand match. The only way to know is to measure his color. Can get a Color Muse on Amazon for $60. If he's a professional painter, he probably owns a portable spectro like Spectro 1 or Pro. Take 3 to 5 scans of his custom color. the average should be close to this data profile. To be clear the numbers won't match but should be within a tight range.