The easy answer is around 10 years for interior paint and 5-7 years for exterior paint. But the more accurate answer is that the longevity of your new paint job depends on a variety of factors such as paint quality, the environment the paint is in and the preparation and professionalism during the painting project.

https://arizonapaintingcompany.com/how-long-will-your-new-paint-job-last/

How Long Does It Take for Paint to Fade? homeowners can expect their interior paint to fade in between five and ten years. They can expect fading of exterior paint to happen within five to seven years. Exterior paint fade faster due to the direct exposure to sunlight, and UV rays.

https://www.paintersinphilly.com/content/why-do-homes-interior-and-exterior-paint-fade-and-how-to-stop-paint-from-fading

Does Paint Get Darker with Second Coat? No, more coats of paint will not make your paint darker. As stated above, the wetness of the paint will initially give off the impression that your paint is darker as you put on more, although this is just the effect of wet paint.

https://painttopics.com/does-paint-dry-darker-or-lighter/

Ultimately, the best way to take good care of your home’s exterior is to treat power washing as a part of routine maintenance. As a general rule, most experts recommend that you wash your home every 6 to 12 months (or one to two times a year)

https://www.andersonpaintingnc.com/blog/how-often-should-you-power-wash-your-home-1

So, yes — you should power wash your house before painting so that the new coat of paint will properly bond to your home exterior. Power washing is the key to ensuring a long-lasting paint job every time.

https://www.sharperimpressionspainting.com/recent-projects/power-washing-your-house-before-painting

Unfortunately, in most cases the answer is no. There are a few circumstances where it can be done with good results, but in most instances the touched-up spot will not blend in, but rather result in a slightly different color that looks even worse than the original blemish.

https://newlifepainting.com/blog/touching-up-house-paint/

Acrylic paint

Acrylic paint is the most durable of all. It’s long-lasting, flexible, and able to withstand fading from the sun or damage from rain and other elements.

https://www.stanfordpainting.com/blog/articles/Exterior-Paints-Which-Type-Lasts-the-Longest

Many home experts agree that the floor color should be darker than the walls. The rule generally applies because lighter walls and a dark floor make the room seem larger. Most homeowners prefer a spacious looking interior. However, the rule can change with low ceilings.

https://www.yourmagnoliahome.com/karens-tips-for-selecting-the-right-color-hardwood/

If the wall is in good condition and the paints are chemically the same (both latex, for instance), you have a few options when the new paint is the opposite shade of the old paint. You can use a primer to thoroughly cover the old color, then apply 1 or 2 coats of the new paint.

https://www.ppgpaints.com/diy/how-to/how-do-i-paint-over-painted-walls

In General, Paint the Walls First, Then the Trim

You typically paint walls with rollers, which can fling small paint drops onto your trim. So, if you’ve already painted the trim with a brush, you’ll have to go back and cover up any splatter afterward. So, save yourself the time and effort by painting the walls first.

https://www.angi.com/articles/do-i-paint-trim-or-walls-first.htm