I don't know if paintings qualify here but I've done some that include framing. The process:
1) Buy masonite piece and cut to sizes.
2) Gesso both sides. I like to leave it rough i.e. no sanding
3) Go out in the field (like to a winery here) and paint the scene. I use Duo Aqua water soluble oils.
4) Cut boards to size to create backing
5) Glue boards and maybe paint sides or leave bare if you like that
Here are 2 hanging in the bathroom, a small and intimate space . Both were done around Kenwood California with views of Kunde Winery.
The second photo shows the sides and some of the brush work.
Beautiful painting of a beautiful place!
I am working on a birthday card for my sister. She is turning 40 this year. I decided to make an illuminated manuscript. I am done with the illumination, and I am getting ready to write the text in copperplate script.