be carefull with headlining some can be very problematic if you get them wet.......... or even damp!
you need paint brushes in various sizes for the dash vents etc etc tbh a car interior, done properly can take a long time.
there is a lot to it if you are doing it properly. There arent many customers who will pay a decent price for the time it takes
to do a proper job in my opinion. I did valeting/detailing for about 25 years prior to starting up doing carpets, much better return
for your work in my opinion. I still get calls to do car upholstery but just dont bother with it. They can go down the local hand wash and get an interior valeted for about £20 quid or less, when you tell em you want about £80/£90 guess where they go....... they dont get the same job, bit of back to black sprayed here and there, quick wet vac with the george and then some bubble gum air fresh sprayed in......... not really a proper clean i dont think!!!