I do use antique paste all the time on seats. I only use the alcohol based stains. On this seat I kept working back and forth from dark to light and medium colors. I used black, dark brown, medium brown, sheridan and buckskin dye; all by Fiebings. I show pics of the seat not because I think it is so terrific but to show the results when the dye is applied nearly dry on a cloth. I used sheriday antique paste when I was done to help blend all the colors. A final coat of leather balm with atom wax as the only finish.
Dave