Changing color of cloth headliner

This is a 70 duster with a green headliner. I don’t think it’s original, but it appears to be in good condition. I’m changing inside to black and plan to spray the headliner with duplicate colors vinyl and fabric die. I’m not planning on doing any scrubbing on the material due to its age, but was going to use something like a light brush or duster to go over it before I’ve sprayed And after I have masked everything off inside. Any tips or suggestions would be appreciated.
On another note, I’m probably want to replace the front bench with black buckets and again I’m looking for something inexpensive. I have one time bought some from a later model Nissan and they were very heavy. The aftermarket I see on Amazon that are very inexpensive, but they don’t have any rails and it appears to be that be an issue to get it mounted. Has anyone got any suggestions for seats that they have used in the first generation here of the duster that fit well and are not too expensive thanks.