I remember doing most of that Ian and like you, didn’t go back to completely ‘clean and shiny’ and used Hammerite ‘smooth’ to paint the floors etc. after making sure the seams were filled
Before you start putting things back together, make sure you remove the rear window, clean the glass and aperture and bond the glass back in otherwise your likely to get water leaking in which will eventually get the car back to where it is now…… Mine had rotted the headlining and wood surround

I used modern ‘Sikaflex’ windscreen/glass bond to secure mine back in, others have used fish tank sealant………….