I just painted my bedroom and master bath SW Alabaster with SW High Reflective White trim and doors. I LOVE the look, both colors work beautifully together. Depending on the time of day (morning sun) it looks white without being too stark white, as the day progresses it warms up turning into a vanilla cream in the evenings. My bedroom is west facing with more windows and a small south window. My master bath is west facing. The High Reflective White stays pretty true to color at all times. Unfortunately they were not able to do the cabinets in HRW as the paint I used on the cabinets could not be mixed in that color. HRW is a color that is funny at Sherwin Williams and kinda' tricky and definitely takes more coats to cover. I used Emerald paint in Alabaster on ceilings, walls, and cabinets in different finishes and Super Paint in Semi Gloss in HRW for trim and doors. I was nervous about using Alabaster on the cabinets in the bathroom but it worked perfectly. I will say, for those that are using a white on walls that is not as warm as Alabaster/White Dove, or more cooler grays (think grays that aren't greige) the Alabaster or White Dove warm soft whites are going to go yellow/cream. I would recommend going with Pure White for cabinets and trim. It is still a soft white without the creaminess of Alabaster. High Reflective White is also a good white it's not as soft as Pure White but still not so white that it looks cheap, but again HRW is hard to cover and cannot be mixed in many sheens and paints. I decided not to go with Pure White with my Alabaster walls because my husband wanted more of a contrast with the doors and trim, I wanted to use Alabaster on everything, but made a compromise with my husband, and went with HRW. I am not at all disappointed with the look. I know I spent countless hours agonizing over the choices and hopefully this will help others that are in the same position.

Try Alien tape❣️I saw a presentation on one of the shopping channels, it is double sided, has some special grip technology, easy to remove and is reusable. I think it holds up to 15 pounds. I have never used it, but you can google it.

Before I answer the shiplap question, I'd like to give you some thoughts: 1. use a pocket door on the master bathroom toilet room. Trying to get in and around that swing in door in order to close it to use the toilet is going to be a pain. 2. Make sure the interior walls of bathrooms are well insulated so you don't get disturbed if one person is asleep and the other is using the bathroom. 3. Consider closing off the hall door to the 2nd bathroom, push that portion of wall inward. Move the vanity to line the new wall and put the door to that bathroom coming from that bedroom. It is not expensive to "T" into the water pipe to have the 2nd bath vanity moved and I'd only have one sink in that bathroom. Then move the laundry doors closer to the stairwell attached where the 2nd bedroom/bathroom wall is drawn. With the space that is created you can put much needed laundry room storage that you will appreciate once you're using that laundry area. As to shiplap . . . I dislike it entirely. I do like the ceiling with more narrow wood planks though.

I dont think they have to match. I have white large slat blinds in my bathrooms with antique white walls to showcase our sage green vanities. I am a fan of white and off white walls, as they add brightness to any room. To use white or colorful walls is your personal taste.