I do not have a step by step photos of the weathering that I made in the interiors of the Il-2. I used Tamiya paints.
To paint the interiors, I used the XF-22. In a new bottle, made a mix with XF-22 and a few drops of white. With this mixture I painted the centers of the panels. Then with black, XF-1, painted lines and corners of the panels. These two mixtures with approximately 80% of diluent.
Once made, with very rapid passages, and with the airbrush almost closed, vertical lines, first with XF-22 and then with XF-01.
Then the chipped paint with a mixture of brown with some black was applied with a sponge.
Clear Gloss applied and after a wash with Bitumen of Judea. Then Matt Clear and painted instruments.